{"id":12896,"date":"2026-09-20T13:47:20","date_gmt":"2026-09-20T05:47:20","guid":{"rendered":"https:\/\/collagensei.com\/?p=12896"},"modified":"2026-09-20T15:20:53","modified_gmt":"2026-09-20T07:20:53","slug":"bang-kich-thuoc-vien-nang-huong-dan-kich-thuoc","status":"publish","type":"post","link":"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/","title":{"rendered":"Capsule Size Chart: Sizes 000 to 5, Dimensions &amp; Fill Capacity"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_87 ez-toc-wrap-left counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Capsule_Size_Chart_Volume_Dimensions_Estimated_Fill_Weight\" >Capsule Size Chart: Volume, Dimensions &amp; Estimated Fill Weight<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#How_to_Use_the_Capsule_Size_Chart\" >How to Use the Capsule Size Chart<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#What_Are_the_Largest_and_Smallest_Capsule_Sizes\" >What Are the Largest and Smallest Capsule Sizes?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Size_000_and_Size_00_Capsules\" >Size 000 and Size 00 Capsules<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Size_000_Capsule\" >Size 000 Capsule<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Size_00_Capsule\" >Size 00 Capsule<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Size_0_and_Size_1_Capsules\" >Size 0 and Size 1 Capsules<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Size_0_Capsule\" >Size 0 Capsule<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Size_1_Capsule\" >Size 1 Capsule<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Sizes_2_3_4_and_5\" >Sizes 2, 3, 4 and 5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Size_0_vs_Size_00_Capsules_What_Is_the_Difference\" >Size 0 vs Size 00 Capsules: What Is the Difference?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#How_Many_Milligrams_Fit_in_a_Capsule\" >How Many Milligrams Fit in a Capsule?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#What_Capsule_Size_Is_Needed_for_500_mg\" >What Capsule Size Is Needed for 500 mg?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Example_1_Density_10_gmL\" >Example 1: Density = 1.0 g\/mL<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Example_2_Density_08_gmL\" >Example 2: Density = 0.8 g\/mL<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Example_3_Density_06_gmL\" >Example 3: Density = 0.6 g\/mL<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Bulk_Density_vs_Tapped_Density\" >Bulk Density vs Tapped Density<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Bulk_Density\" >Bulk Density<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Tapped_Density\" >Tapped Density<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Which_Density_Should_Be_Used_for_Capsule_Filling\" >Which Density Should Be Used for Capsule Filling?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Worked_Example_When_a_500_mg_Formula_May_Not_Fit_Size_0\" >Worked Example: When a 500 mg Formula May Not Fit Size 0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Capsule_Fill_Weight_Size_Calculator\" >Capsule Fill Weight &amp; Size Calculator<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Find_a_Starting_Capsule_Size\" >Find a Starting Capsule Size<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Example\" >Example<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Capsule_Fill_Weight_Size_Calculator-2\" >Capsule Fill Weight &amp; Size Calculator<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Do_Gelatin_and_HPMC_Capsules_Use_the_Same_Size_System\" >Do Gelatin and HPMC Capsules Use the Same Size System?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Choosing_Capsule_Size_for_a_Commercial_Supplement_Formula\" >Choosing Capsule Size for a Commercial Supplement Formula<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#1_Complete_Formula_Volume\" >1. Complete Formula Volume<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#2_Capsules_per_Serving\" >2. Capsules per Serving<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#3_Packaging_Configuration\" >3. Packaging Configuration<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#4_Manufacturing_Validation\" >4. Manufacturing Validation<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Developing_a_Capsule_Supplement\" >Developing a Capsule Supplement?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Frequently_Asked_Questions_About_Capsule_Sizes\" >Frequently Asked Questions About Capsule Sizes<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#What_is_the_largest_capsule_size\" >What is the largest capsule size?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#What_is_the_smallest_capsule_size\" >What is the smallest capsule size?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#How_many_mg_fit_in_a_Size_00_capsule\" >How many mg fit in a Size 00 capsule?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#What_is_the_difference_between_Size_0_and_Size_00\" >What is the difference between Size 0 and Size 00?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#What_capsule_size_is_needed_for_500_mg\" >What capsule size is needed for 500 mg?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Why_can_the_same_capsule_size_hold_different_milligram_amounts\" >Why can the same capsule size hold different milligram amounts?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-40\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Do_gelatin_and_HPMC_capsules_use_the_same_size_numbers\" >Do gelatin and HPMC capsules use the same size numbers?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-41\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#Conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-42\" href=\"https:\/\/collagensei.com\/vi\/capsule-sizes-chart-dimensions-guide\/#References\" >References<\/a><\/li><\/ul><\/nav><\/div>\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1000\" height=\"562\" src=\"https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Capsule-Sizes-From-Size-000-to-Size-5.webp\" alt=\"Capsule Sizes From Size 000 to Size 5\" class=\"wp-image-12907\" srcset=\"https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Capsule-Sizes-From-Size-000-to-Size-5.webp 1000w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Capsule-Sizes-From-Size-000-to-Size-5-300x169.webp 300w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Capsule-Sizes-From-Size-000-to-Size-5-768x432.webp 768w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Capsule-Sizes-From-Size-000-to-Size-5-18x10.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Choosing a capsule size starts with volume\u2014not a fixed milligram number.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hard capsules are manufactured in standard size ranges, but the amount of powder that fits inside a capsule depends on the density and filling behavior of the final formulation. Two blends with the same target weight can therefore require different capsule sizes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Use this guide to compare capsule sizes 000 through 5, estimate powder capacity, compare Size 0 vs Size 00, and calculate a starting capsule size for formulation development.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Quick reference<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Largest standard size:<\/strong> Size 000<br><strong>Smallest standard size:<\/strong> Size 5<br><strong>Common commercial supplement sizes:<\/strong> Size 0 and Size 00<br><strong>What determines fill weight:<\/strong> Capsule volume \u00d7 formulation density<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Important:<\/strong> The capacities shown in this guide are planning estimates. Final capsule selection should be confirmed with the actual finished blend, shell specification and intended filling process.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Capsule_Size_Chart_Volume_Dimensions_Estimated_Fill_Weight\"><\/span>Capsule Size Chart: Volume, Dimensions &amp; Estimated Fill Weight<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The most useful fixed specification for estimating capsule capacity is the shell&#8217;s <strong>internal volume<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Milligram capacity is variable because powders have different densities.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The estimated fill weights below are calculated using:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Estimated Fill Weight (mg) = Capsule Volume (mL) \u00d7 Powder Density (g\/mL) \u00d7 1,000<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Capsule Size<\/th><th>Nominal Volume<\/th><th>Approx. Locked Length<\/th><th>At 0.4 g\/mL<\/th><th>At 0.6 g\/mL<\/th><th>At 0.8 g\/mL<\/th><th>At 1.0 g\/mL<\/th><th>At 1.2 g\/mL<\/th><\/tr><\/thead><tbody><tr><td>000<\/td><td>1.37 mL<\/td><td>26.1 mm<\/td><td>548 mg<\/td><td>822 mg<\/td><td>1,096 mg<\/td><td>1,370 mg<\/td><td>1,644 mg<\/td><\/tr><tr><td>00<\/td><td>0.91 mL<\/td><td>23.3 mm<\/td><td>364 mg<\/td><td>546 mg<\/td><td>728 mg<\/td><td>910 mg<\/td><td>1,092 mg<\/td><\/tr><tr><td>0<\/td><td>0.68 mL<\/td><td>21.7 mm<\/td><td>272 mg<\/td><td>408 mg<\/td><td>544 mg<\/td><td>680 mg<\/td><td>816 mg<\/td><\/tr><tr><td>1<\/td><td>0.50 mL<\/td><td>19.4 mm<\/td><td>200 mg<\/td><td>300 mg<\/td><td>400 mg<\/td><td>500 mg<\/td><td>600 mg<\/td><\/tr><tr><td>2<\/td><td>0.37 mL<\/td><td>18.0 mm<\/td><td>148 mg<\/td><td>222 mg<\/td><td>296 mg<\/td><td>370 mg<\/td><td>444 mg<\/td><\/tr><tr><td>3<\/td><td>0.30 mL<\/td><td>15.9 mm<\/td><td>120 mg<\/td><td>180 mg<\/td><td>240 mg<\/td><td>300 mg<\/td><td>360 mg<\/td><\/tr><tr><td>4<\/td><td>0.25 mL<\/td><td>14.3 mm<\/td><td>100 mg<\/td><td>150 mg<\/td><td>200 mg<\/td><td>250 mg<\/td><td>300 mg<\/td><\/tr><tr><td>5<\/td><td>0.13 mL<\/td><td>11.1 mm<\/td><td>52 mg<\/td><td>78 mg<\/td><td>104 mg<\/td><td>130 mg<\/td><td>156 mg<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">These values should be treated as <strong>reference estimates rather than guaranteed production capacities<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Published capsule specifications can differ slightly between manufacturers. More importantly, actual production fill depends on the finished blend, including powder density, particle characteristics, flowability, excipients and the capsule-filling process.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_to_Use_the_Capsule_Size_Chart\"><\/span>How to Use the Capsule Size Chart<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Start with the amount of formulation you want to place in each capsule.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This should include not only active ingredients but also any excipients required for the finished formulation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Next, determine or estimate the density of the formulation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The approximate internal volume required can then be calculated using:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Required Volume (mL) = Target Fill Weight (mg) \u00f7 [Density (g\/mL) \u00d7 1,000]<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For example, suppose the target fill weight is <strong>500 mg<\/strong> and the finished blend has a density of <strong>0.8 g\/mL<\/strong>:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>500 \u00f7 800 = 0.625 mL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A capsule therefore needs more than approximately 0.625 mL of usable volume for this formulation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A Size 0 capsule has a nominal reference volume of about 0.68 mL, so it may be a reasonable starting size to evaluate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That does <strong>not<\/strong> mean Size 0 is guaranteed to hold the formula in commercial production. The result should still be confirmed using the actual finished blend and intended filling process.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1000\" height=\"545\" src=\"https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/How-to-Choose-a-Capsule-Size-by-Fill-Weight-and-Density.webp\" alt=\"Diagram showing how target fill weight and formulation density are used to estimate capsule size\" class=\"wp-image-25773\" srcset=\"https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/How-to-Choose-a-Capsule-Size-by-Fill-Weight-and-Density.webp 1000w, https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/How-to-Choose-a-Capsule-Size-by-Fill-Weight-and-Density-300x164.webp 300w, https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/How-to-Choose-a-Capsule-Size-by-Fill-Weight-and-Density-767x418.webp 767w, https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/How-to-Choose-a-Capsule-Size-by-Fill-Weight-and-Density-18x10.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Are_the_Largest_and_Smallest_Capsule_Sizes\"><\/span>What Are the Largest and Smallest Capsule Sizes?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Within the common Size 000 through Size 5 hard-capsule reference range, the sequence runs:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>000 \u2192 00 \u2192 0 \u2192 1 \u2192 2 \u2192 3 \u2192 4 \u2192 5<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Size <strong>000<\/strong> is the largest in this sequence.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Size <strong>5<\/strong> is the smallest.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As the capsule size moves from 000 toward 5, both the physical capsule dimensions and available internal volume decrease.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is why capsule size should be selected according to the amount of <strong>formulation volume<\/strong> required\u2014not simply according to the target number of milligrams.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"1000\" height=\"562\" src=\"https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Largest-vs-Smallest-capsule.webp\" alt=\"Largest vs Smallest capsule\" class=\"wp-image-12917\" srcset=\"https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Largest-vs-Smallest-capsule.webp 1000w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Largest-vs-Smallest-capsule-300x169.webp 300w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Largest-vs-Smallest-capsule-768x432.webp 768w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Largest-vs-Smallest-capsule-18x10.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Size_000_and_Size_00_Capsules\"><\/span>Size 000 and Size 00 Capsules<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Size_000_Capsule\"><\/span>Size 000 Capsule<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Size 000 provides the largest nominal volume in the standard 000-to-5 range.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Its nominal reference volume is approximately <strong>1.37 mL<\/strong>, with a locked length of approximately <strong>26.1 mm<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A theoretical fill calculation illustrates how strongly formulation density affects capacity:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At <strong>0.6 g\/mL<\/strong>, approximately <strong>822 mg<\/strong> of powder would occupy 1.37 mL.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At <strong>0.8 g\/mL<\/strong>, the theoretical fill weight increases to approximately <strong>1,096 mg<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At <strong>1.0 g\/mL<\/strong>, it increases to approximately <strong>1,370 mg<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">These figures are mathematical estimates. Actual production performance depends on the finished blend and filling process.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"545\" src=\"https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/size-000-vs-size-00-capsule-comparison.webp\" alt=\"Size 000 versus size 00 capsule dimensions and volume comparison\" class=\"wp-image-25775\" srcset=\"https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/size-000-vs-size-00-capsule-comparison.webp 1000w, https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/size-000-vs-size-00-capsule-comparison-300x164.webp 300w, https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/size-000-vs-size-00-capsule-comparison-18x10.webp 18w, https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/size-000-vs-size-00-capsule-comparison-767x418.webp 767w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Size_00_Capsule\"><\/span>Size 00 Capsule<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Size 00 provides more internal volume than Size 0 and is often evaluated when a formulation requires more space than a smaller shell can provide.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Its nominal reference volume is approximately <strong>0.91 mL<\/strong>, with a locked length of approximately <strong>23.3 mm<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Theoretical capacity is approximately:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>546 mg at 0.6 g\/mL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>728 mg at 0.8 g\/mL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>910 mg at 1.0 g\/mL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is why statements such as \u201ca Size 00 capsule holds 700 mg\u201d should be treated cautiously. A value near 700 mg may be reasonable for some blends, while a lighter or denser formulation can produce a very different result.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Size_0_and_Size_1_Capsules\"><\/span>Size 0 and Size 1 Capsules<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Size_0_Capsule\"><\/span>Size 0 Capsule<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Size 0 has a nominal internal volume of approximately <strong>0.68 mL<\/strong> and a locked length of approximately <strong>21.7 mm<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Theoretical fill weight is approximately:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>408 mg at 0.6 g\/mL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>544 mg at 0.8 g\/mL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>680 mg at 1.0 g\/mL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Whether a specific formula will fit should be confirmed using the complete formulation, including excipients\u2014not just the declared active ingredients.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Size_1_Capsule\"><\/span>Size 1 Capsule<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Size 1 provides approximately <strong>0.50 mL<\/strong> of nominal internal volume and has an approximate locked length of <strong>19.4 mm<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At a density of 0.8 g\/mL, its theoretical capacity is approximately <strong>400 mg<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At a density of 1.0 g\/mL, the theoretical value is approximately <strong>500 mg<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">As with every capsule size, these values are estimates based on volume and density rather than guaranteed filling specifications.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Sizes_2_3_4_and_5\"><\/span>Sizes 2, 3, 4 and 5<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Smaller capsule sizes provide progressively less internal volume.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Size 2:<\/strong> approximately 0.37 mL<br><strong>Size 3:<\/strong> approximately 0.30 mL<br><strong>Size 4:<\/strong> approximately 0.25 mL<br><strong>Size 5:<\/strong> approximately 0.13 mL<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The same formulation rule applies at every size:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Required formulation volume should be calculated first, and the final capsule should then be validated using the actual blend and production process.<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Smaller <a class=\"wpil_keyword_link\" href=\"https:\/\/collagensei.com\/supplement-capsules-safety-composition-usage\/\" target=\"_blank\"  rel=\"noopener\" title=\"What Are Supplement Capsules Made Of? Safety, Materials &amp; Brand Selection Guide\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4029\">capsules<\/a> are therefore not automatically \u201cbetter\u201d or \u201ceasier.\u201d They are appropriate only when the required formulation volume is compatible with the available shell capacity.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"559\" src=\"https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/size-0-vs-00-capsule-comparison-1024x559.webp\" alt=\"Size 0 vs Size 00 capsule comparison with ruler\" class=\"wp-image-20055\" srcset=\"https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/size-0-vs-00-capsule-comparison-1024x559.webp 1024w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/size-0-vs-00-capsule-comparison-300x164.webp 300w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/size-0-vs-00-capsule-comparison-768x419.webp 768w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/size-0-vs-00-capsule-comparison-1536x838.webp 1536w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/size-0-vs-00-capsule-comparison-2048x1117.webp 2048w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/size-0-vs-00-capsule-comparison-18x10.webp 18w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Size_0_vs_Size_00_Capsules_What_Is_the_Difference\"><\/span>Size 0 vs Size 00 Capsules: What Is the Difference?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Size 0 and Size 00 are frequently compared because both are commonly considered for dietary supplement formulas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The main difference is <strong>available internal volume<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Factor<\/th><th>Size 0<\/th><th>Size 00<\/th><\/tr><\/thead><tbody><tr><td>Nominal volume<\/td><td>~0.68 mL<\/td><td>~0.91 mL<\/td><\/tr><tr><td>Approx. locked length<\/td><td>~21.7 mm<\/td><td>~23.3 mm<\/td><\/tr><tr><td>Estimated fill at 0.6 g\/mL<\/td><td>~408 mg<\/td><td>~546 mg<\/td><\/tr><tr><td>Estimated fill at 0.8 g\/mL<\/td><td>~544 mg<\/td><td>~728 mg<\/td><\/tr><tr><td>Estimated fill at 1.0 g\/mL<\/td><td>~680 mg<\/td><td>~910 mg<\/td><\/tr><tr><td>Primary difference<\/td><td>Smaller physical format<\/td><td>More formulation volume<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"562\" src=\"https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Capsule-Size-0-vs-00.webp\" alt=\"Capsule Size 0 vs 00\" class=\"wp-image-12909\" srcset=\"https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Capsule-Size-0-vs-00.webp 1000w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Capsule-Size-0-vs-00-300x169.webp 300w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Capsule-Size-0-vs-00-768x432.webp 768w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Capsule-Size-0-vs-00-18x10.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Size 00 offers approximately <strong>34% more nominal internal volume<\/strong> than Size 0 based on the reference values above.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That additional volume can matter when a formula contains high-dose ingredients, low-density powders or multiple active ingredients and excipients.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If the complete formulation fits comfortably into Size 0 under realistic filling conditions, moving to a larger shell may not be necessary.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If Size 0 does not provide sufficient volume, possible options include:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">moving to Size 00;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">using more than one capsule per serving;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">adjusting the target dose; or<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">reviewing the formulation and excipient system.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The best solution depends on the product rather than on capsule size alone.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_Many_Milligrams_Fit_in_a_Capsule\"><\/span>How Many Milligrams Fit in a Capsule?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">There is <strong>no single milligram capacity for any capsule size<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A capsule shell defines <strong>volume<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Milligrams define <strong>weight<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The relationship between volume and weight depends on formulation density.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A light botanical powder may occupy a relatively large volume even at a modest weight. A denser mineral-containing blend can place substantially more weight into the same nominal capsule volume.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The basic planning equation is:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"562\" src=\"https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Different-Density-Different-Weight.webp\" alt=\"Same capsule size with different powder densities and fill weights\" class=\"wp-image-12915\" srcset=\"https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Different-Density-Different-Weight.webp 1000w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Different-Density-Different-Weight-300x169.webp 300w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Different-Density-Different-Weight-768x432.webp 768w, https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/Different-Density-Different-Weight-18x10.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Estimated Fill Weight (mg) = Capsule Volume (mL) \u00d7 Formulation Density (g\/mL) \u00d7 1,000<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For example, consider a Size 00 capsule with a nominal reference volume of approximately 0.91 mL.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At 0.4 g\/mL:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>0.91 \u00d7 0.4 \u00d7 1,000 = approximately 364 mg<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At 0.8 g\/mL:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>0.91 \u00d7 0.8 \u00d7 1,000 = approximately 728 mg<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At 1.2 g\/mL:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>0.91 \u00d7 1.2 \u00d7 1,000 = approximately 1,092 mg<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The capsule size has not changed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Only the assumed powder density changed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That is why capsule capacity should not be described using one universal milligram figure.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_Capsule_Size_Is_Needed_for_500_mg\"><\/span>What Capsule Size Is Needed for 500 mg?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A target of <strong>500 mg does not determine capsule size by itself<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The required capsule volume depends on the density of the complete finished blend.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Example_1_Density_10_gmL\"><\/span>Example 1: Density = 1.0 g\/mL<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">500 mg \u00f7 1,000 mg\/mL = <strong>0.50 mL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A formulation with this density requires approximately 0.50 mL of theoretical volume.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Example_2_Density_08_gmL\"><\/span>Example 2: Density = 0.8 g\/mL<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">500 mg \u00f7 800 mg\/mL = <strong>0.625 mL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A Size 0 capsule, with approximately 0.68 mL of nominal reference volume, may therefore be an appropriate starting size to evaluate.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Example_3_Density_06_gmL\"><\/span>Example 3: Density = 0.6 g\/mL<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">500 mg \u00f7 600 mg\/mL = <strong>0.833 mL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This exceeds the nominal reference volume of Size 0.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A larger capsule such as Size 00 would therefore be a more appropriate starting option to evaluate.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The same 500 mg target can therefore require different capsule sizes depending on formulation density.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In commercial development, additional factors such as excipients, flowability and the filling process must also be considered.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"545\" src=\"https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/500mg-capsule-size-density-example.webp\" alt=\"Example showing why 500 mg can require different capsule sizes depending on powder density\" class=\"wp-image-25778\" srcset=\"https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/500mg-capsule-size-density-example.webp 1000w, https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/500mg-capsule-size-density-example-300x164.webp 300w, https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/500mg-capsule-size-density-example-767x418.webp 767w, https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/500mg-capsule-size-density-example-18x10.webp 18w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Bulk_Density_vs_Tapped_Density\"><\/span>Bulk Density vs Tapped Density<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Density is one of the most important factors when estimating capsule capacity, but not every density measurement represents the same powder condition.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Bulk_Density\"><\/span>Bulk Density<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Bulk density is the mass of a powder divided by the volume it occupies in its loose, unsettled condition.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It includes the empty spaces between particles and is affected by the material itself as well as how the particles arrange in the powder bed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Tapped_Density\"><\/span>Tapped Density<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Tapped density is measured after a powder sample undergoes a defined mechanical tapping procedure that reduces some of the void space between particles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">describes standardized concepts and procedures for measuring bulk and tapped density of powders.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tapped density is normally higher than loose bulk density because the particles have been allowed to consolidate.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"545\" src=\"https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/bulk-density-vs-tapped-density-powder.webp\" alt=\"Bulk density versus tapped density of powder used for capsule formulation\" class=\"wp-image-25780\" srcset=\"https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/bulk-density-vs-tapped-density-powder.webp 1000w, https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/bulk-density-vs-tapped-density-powder-300x164.webp 300w, https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/bulk-density-vs-tapped-density-powder-18x10.webp 18w, https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/bulk-density-vs-tapped-density-powder-767x418.webp 767w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Which_Density_Should_Be_Used_for_Capsule_Filling\"><\/span>Which Density Should Be Used for Capsule Filling?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Neither number should automatically be treated as the final commercial capsule-fill value.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Both can provide useful information during development, but actual filling performance can also depend on:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">particle-size distribution;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">powder flowability;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">formulation composition;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">excipients;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">cohesiveness;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">moisture behavior; and<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">the dosing mechanism used by the capsule-filling equipment.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Commercial capsule-filling systems can use different approaches, including tamping and dosator-based mechanisms. Powder properties can influence how these systems form and deliver the dose.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For this reason:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Use density calculations to shortlist capsule sizes. Confirm the final target using the finished blend and intended filling process.<\/strong><\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Worked_Example_When_a_500_mg_Formula_May_Not_Fit_Size_0\"><\/span>Worked Example: When a 500 mg Formula May Not Fit Size 0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Illustrative formulation example.<\/em><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Consider a botanical supplement formula with a target fill weight of <strong>500 mg per capsule<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Assume the finished powder blend has a measured density of <strong>0.58 g\/mL<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Required volume:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>500 mg \u00f7 580 mg\/mL = approximately 0.86 mL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A Size 0 capsule has a nominal reference volume of approximately 0.68 mL.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Based on the theoretical calculation, the formula therefore requires more volume than Size 0 provides.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A formulation team could then evaluate several options:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">move to a larger capsule such as Size 00;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">reduce the amount placed into each capsule and use multiple capsules per serving;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">adjust the formula or excipient system if technically appropriate; or<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">reconsider the intended serving design.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This example shows why a generic statement such as \u201c500 mg fits in Size 0\u201d can be misleading.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The target milligrams must always be considered together with formulation volume and density.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Capsule_Fill_Weight_Size_Calculator\"><\/span>Capsule Fill Weight &amp; Size Calculator<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Use the calculator below as an <strong>early formulation screening tool<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It is not a guaranteed production specification.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Find_a_Starting_Capsule_Size\"><\/span>Find a Starting Capsule Size<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Enter:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Target fill weight:<\/strong> ___ mg<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Formulation density:<\/strong> ___ g\/mL<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The calculator should first determine:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Required volume = Target weight \u00f7 Density<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It can then compare that volume with the nominal capsule volumes shown in this guide.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Example\"><\/span>Example<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Target fill weight: <strong>500 mg<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Density: <strong>0.80 g\/mL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Required volume:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>500 \u00f7 800 = 0.625 mL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Starting size estimate:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Size 0<\/strong><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>Important:<\/strong> The result is based on nominal capsule volume and the density entered into the calculator. Confirm the final capsule size using the actual formulation, shell specification and intended filling process.<\/p>\n<\/blockquote>\n\n\n\n<!-- GENSEI Capsule Size & Fill Weight Calculator -->\n<div id=\"cg-capsule-calculator\">\n\n  <style>\n    #cg-capsule-calculator {\n      --cg-accent: #1f5d50;\n      --cg-accent-dark: #17483e;\n      --cg-accent-light: #eef7f4;\n      --cg-text: #1f2937;\n      --cg-muted: #667085;\n      --cg-border: #d9e1e7;\n      --cg-bg-soft: #f8fafb;\n      --cg-warning: #fff8e6;\n      --cg-warning-border: #e8c866;\n\n      font-family: Arial, Helvetica, sans-serif;\n      color: var(--cg-text);\n      max-width: 920px;\n      margin: 32px auto;\n      line-height: 1.55;\n    }\n\n    #cg-capsule-calculator * {\n      box-sizing: border-box;\n    }\n\n    #cg-capsule-calculator .cg-calculator {\n      border: 1px solid var(--cg-border);\n      border-radius: 16px;\n      overflow: hidden;\n      background: #ffffff;\n    }\n\n    #cg-capsule-calculator .cg-header {\n      padding: 28px 30px 20px;\n    }\n\n    #cg-capsule-calculator .cg-title {\n      margin: 0 0 8px;\n      font-size: 28px;\n      line-height: 1.25;\n      font-weight: 700;\n    }\n\n    #cg-capsule-calculator .cg-intro {\n      margin: 0;\n      color: var(--cg-muted);\n      font-size: 15px;\n    }\n\n    #cg-capsule-calculator .cg-tabs {\n      display: grid;\n      grid-template-columns: 1fr 1fr;\n      border-top: 1px solid var(--cg-border);\n      border-bottom: 1px solid var(--cg-border);\n    }\n\n    #cg-capsule-calculator .cg-tab {\n      appearance: none;\n      border: 0;\n      background: var(--cg-bg-soft);\n      padding: 16px;\n      min-height: 52px;\n      font-size: 15px;\n      font-weight: 700;\n      cursor: pointer;\n      color: var(--cg-text);\n      transition: background .2s ease, color .2s ease;\n    }\n\n    #cg-capsule-calculator .cg-tab:first-child {\n      border-right: 1px solid var(--cg-border);\n    }\n\n    #cg-capsule-calculator .cg-tab.is-active {\n      background: var(--cg-accent);\n      color: #ffffff;\n    }\n\n    #cg-capsule-calculator .cg-tab:focus-visible,\n    #cg-capsule-calculator input:focus-visible,\n    #cg-capsule-calculator select:focus-visible,\n    #cg-capsule-calculator button:focus-visible {\n      outline: 3px solid rgba(31, 93, 80, .22);\n      outline-offset: 2px;\n    }\n\n    #cg-capsule-calculator .cg-panel {\n      display: none;\n      padding: 30px;\n    }\n\n    #cg-capsule-calculator .cg-panel.is-active {\n      display: block;\n    }\n\n    #cg-capsule-calculator .cg-grid {\n      display: grid;\n      grid-template-columns: repeat(2, minmax(0, 1fr));\n      gap: 20px;\n    }\n\n    #cg-capsule-calculator .cg-field label {\n      display: block;\n      font-size: 14px;\n      font-weight: 700;\n      margin-bottom: 7px;\n    }\n\n    #cg-capsule-calculator .cg-field-note {\n      display: block;\n      font-size: 12px;\n      color: var(--cg-muted);\n      margin-top: 6px;\n    }\n\n    #cg-capsule-calculator input,\n    #cg-capsule-calculator select {\n      display: block;\n      width: 100%;\n      min-height: 48px;\n      padding: 10px 13px;\n      border: 1px solid var(--cg-border);\n      border-radius: 8px;\n      background: #fff;\n      color: var(--cg-text);\n      font-size: 16px;\n    }\n\n    #cg-capsule-calculator .cg-density-presets {\n      display: flex;\n      flex-wrap: wrap;\n      gap: 8px;\n      margin-top: 12px;\n    }\n\n    #cg-capsule-calculator .cg-preset {\n      appearance: none;\n      border: 1px solid var(--cg-border);\n      background: #fff;\n      border-radius: 100px;\n      padding: 7px 11px;\n      color: var(--cg-muted);\n      font-size: 12px;\n      cursor: pointer;\n    }\n\n    #cg-capsule-calculator .cg-preset:hover {\n      border-color: var(--cg-accent);\n      color: var(--cg-accent);\n    }\n\n    #cg-capsule-calculator .cg-actions {\n      margin-top: 22px;\n    }\n\n    #cg-capsule-calculator .cg-button {\n      appearance: none;\n      border: none;\n      background: var(--cg-accent);\n      color: #fff;\n      border-radius: 8px;\n      min-height: 48px;\n      padding: 11px 22px;\n      font-weight: 700;\n      font-size: 15px;\n      cursor: pointer;\n    }\n\n    #cg-capsule-calculator .cg-button:hover {\n      background: var(--cg-accent-dark);\n    }\n\n    #cg-capsule-calculator .cg-error {\n      display: none;\n      margin-top: 16px;\n      border: 1px solid #e8b4b4;\n      background: #fff4f4;\n      color: #8a2727;\n      border-radius: 8px;\n      padding: 11px 13px;\n      font-size: 14px;\n    }\n\n    #cg-capsule-calculator .cg-result {\n      display: none;\n      margin-top: 26px;\n    }\n\n    #cg-capsule-calculator .cg-result.is-visible {\n      display: block;\n    }\n\n    #cg-capsule-calculator .cg-result-main {\n      background: var(--cg-accent-light);\n      border: 1px solid rgba(31, 93, 80, .22);\n      border-radius: 12px;\n      padding: 22px;\n    }\n\n    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3px;\n    }\n\n    #cg-capsule-calculator .cg-stat-value {\n      display: block;\n      font-weight: 700;\n      font-size: 17px;\n    }\n\n    #cg-capsule-calculator .cg-comparison {\n      margin-top: 18px;\n      border: 1px solid var(--cg-border);\n      border-radius: 10px;\n      overflow: hidden;\n    }\n\n    #cg-capsule-calculator .cg-comparison-title {\n      padding: 12px 14px;\n      background: var(--cg-bg-soft);\n      font-weight: 700;\n      font-size: 14px;\n      border-bottom: 1px solid var(--cg-border);\n    }\n\n    #cg-capsule-calculator .cg-size-row {\n      display: grid;\n      grid-template-columns: 70px 1fr 110px;\n      align-items: center;\n      gap: 14px;\n      padding: 11px 14px;\n      border-bottom: 1px solid var(--cg-border);\n      font-size: 13px;\n    }\n\n    #cg-capsule-calculator .cg-size-row:last-child {\n      border-bottom: 0;\n    }\n\n    #cg-capsule-calculator .cg-size-row.is-selected {\n      background: var(--cg-accent-light);\n      font-weight: 700;\n    }\n\n    #cg-capsule-calculator .cg-size-bar-wrap {\n      height: 8px;\n      background: #edf0f2;\n      border-radius: 20px;\n      overflow: hidden;\n    }\n\n    #cg-capsule-calculator .cg-size-bar {\n      display: block;\n      height: 100%;\n      background: #8b98a5;\n      border-radius: 20px;\n    }\n\n    #cg-capsule-calculator .cg-size-row.is-selected .cg-size-bar {\n      background: var(--cg-accent);\n    }\n\n    #cg-capsule-calculator .cg-status {\n      text-align: right;\n      color: var(--cg-muted);\n    }\n\n    #cg-capsule-calculator .cg-note {\n      margin-top: 22px;\n      padding: 15px 16px;\n      border: 1px solid var(--cg-warning-border);\n      background: var(--cg-warning);\n      border-radius: 10px;\n      font-size: 13px;\n      color: #675521;\n    }\n\n    #cg-capsule-calculator .cg-formula {\n      margin-top: 20px;\n      padding: 14px 16px;\n      border-left: 4px solid var(--cg-accent);\n      background: var(--cg-bg-soft);\n      font-size: 14px;\n    }\n\n    #cg-capsule-calculator .cg-table-wrap {\n      overflow-x: auto;\n      margin-top: 20px;\n    }\n\n    #cg-capsule-calculator table {\n      width: 100%;\n      border-collapse: collapse;\n      min-width: 620px;\n      font-size: 13px;\n    }\n\n    #cg-capsule-calculator th,\n    #cg-capsule-calculator td {\n      padding: 10px 12px;\n      border: 1px solid var(--cg-border);\n      text-align: left;\n    }\n\n    #cg-capsule-calculator th {\n      background: var(--cg-bg-soft);\n      font-weight: 700;\n    }\n\n    #cg-capsule-calculator .cg-footer-note {\n      padding: 0 30px 28px;\n      color: var(--cg-muted);\n      font-size: 12px;\n    }\n\n    @media (max-width: 680px) {\n      #cg-capsule-calculator {\n        margin: 22px auto;\n      }\n\n      #cg-capsule-calculator .cg-header,\n      #cg-capsule-calculator .cg-panel {\n        padding: 22px 18px;\n      }\n\n      #cg-capsule-calculator .cg-title {\n        font-size: 23px;\n      }\n\n      #cg-capsule-calculator .cg-grid,\n      #cg-capsule-calculator .cg-result-stats {\n        grid-template-columns: 1fr;\n      }\n\n      #cg-capsule-calculator .cg-tabs {\n        grid-template-columns: 1fr;\n      }\n\n      #cg-capsule-calculator .cg-tab:first-child {\n        border-right: 0;\n        border-bottom: 1px solid var(--cg-border);\n      }\n\n      #cg-capsule-calculator .cg-size-row {\n        grid-template-columns: 60px 1fr 90px;\n        gap: 8px;\n      }\n    }\n  <\/style>\n\n  <div class=\"cg-calculator\">\n\n    <div class=\"cg-header\">\n      <h2 class=\"cg-title\"><span class=\"ez-toc-section\" id=\"Capsule_Fill_Weight_Size_Calculator-2\"><\/span>Capsule Fill Weight &amp; Size Calculator<span class=\"ez-toc-section-end\"><\/span><\/h2>\n      <p class=\"cg-intro\">\n        Estimate a starting capsule size from target fill weight and formulation\n        density, or estimate the theoretical fill weight of a selected capsule.\n      <\/p>\n    <\/div>\n\n    <div class=\"cg-tabs\" role=\"tablist\" aria-label=\"Capsule calculator modes\">\n      <button\n        class=\"cg-tab is-active\"\n        type=\"button\"\n        role=\"tab\"\n        aria-selected=\"true\"\n        aria-controls=\"cg-panel-size\"\n        id=\"cg-tab-size\">\n        Find a Starting Capsule Size\n      <\/button>\n\n      <button\n        class=\"cg-tab\"\n        type=\"button\"\n        role=\"tab\"\n        aria-selected=\"false\"\n        aria-controls=\"cg-panel-weight\"\n        id=\"cg-tab-weight\">\n        Estimate Fill Weight\n      <\/button>\n    <\/div>\n\n\n    <!-- TAB 1: FIND CAPSULE SIZE -->\n    <section\n      class=\"cg-panel is-active\"\n      id=\"cg-panel-size\"\n      role=\"tabpanel\"\n      aria-labelledby=\"cg-tab-size\">\n\n      <div class=\"cg-grid\">\n\n        <div class=\"cg-field\">\n          <label for=\"cg-target-weight\">\n            Target Fill Weight (mg)\n          <\/label>\n\n          <input\n            id=\"cg-target-weight\"\n            type=\"number\"\n            inputmode=\"decimal\"\n            min=\"1\"\n            max=\"10000\"\n            step=\"1\"\n            value=\"500\">\n\n          <span class=\"cg-field-note\">\n            Enter the total amount of finished blend intended for one capsule.\n          <\/span>\n        <\/div>\n\n\n        <div class=\"cg-field\">\n          <label for=\"cg-density-size\">\n            Formulation Density (g\/mL)\n          <\/label>\n\n          <input\n            id=\"cg-density-size\"\n            type=\"number\"\n            inputmode=\"decimal\"\n            min=\"0.05\"\n            max=\"5\"\n            step=\"0.01\"\n            value=\"0.80\">\n\n          <div class=\"cg-density-presets\" aria-label=\"Density examples\">\n            <button type=\"button\" class=\"cg-preset\" data-density=\"0.4\">\n              0.4 Low\n            <\/button>\n\n            <button type=\"button\" class=\"cg-preset\" data-density=\"0.6\">\n              0.6\n            <\/button>\n\n            <button type=\"button\" class=\"cg-preset\" data-density=\"0.8\">\n              0.8\n            <\/button>\n\n            <button type=\"button\" class=\"cg-preset\" data-density=\"1.0\">\n              1.0\n            <\/button>\n\n            <button type=\"button\" class=\"cg-preset\" data-density=\"1.2\">\n              1.2 High\n            <\/button>\n          <\/div>\n\n          <span class=\"cg-field-note\">\n            Use measured formulation data when available.\n          <\/span>\n        <\/div>\n\n      <\/div>\n\n\n      <div class=\"cg-actions\">\n        <button type=\"button\" class=\"cg-button\" id=\"cg-calculate-size\">\n          Estimate Capsule Size\n        <\/button>\n      <\/div>\n\n\n      <div class=\"cg-error\" id=\"cg-size-error\" role=\"alert\"><\/div>\n\n\n      <div\n        class=\"cg-result\"\n        id=\"cg-size-result\"\n        aria-live=\"polite\">\n\n        <div class=\"cg-result-main\">\n\n          <div class=\"cg-result-eyebrow\">\n            Starting Size Estimate\n          <\/div>\n\n          <div class=\"cg-result-value\" id=\"cg-size-name\">\n            Size 0\n          <\/div>\n\n          <p class=\"cg-result-sub\" id=\"cg-size-message\"><\/p>\n\n          <div class=\"cg-result-stats\">\n\n            <div class=\"cg-stat\">\n              <span class=\"cg-stat-label\">\n                Required Volume\n              <\/span>\n              <span class=\"cg-stat-value\" id=\"cg-required-volume\">\n                \u2014\n              <\/span>\n            <\/div>\n\n            <div class=\"cg-stat\">\n              <span class=\"cg-stat-label\">\n                Nominal Capsule Volume\n              <\/span>\n              <span class=\"cg-stat-value\" id=\"cg-selected-volume\">\n                \u2014\n              <\/span>\n            <\/div>\n\n            <div class=\"cg-stat\">\n              <span class=\"cg-stat-label\">\n                Nominal Volume Margin\n              <\/span>\n              <span class=\"cg-stat-value\" id=\"cg-volume-margin\">\n                \u2014\n              <\/span>\n            <\/div>\n\n          <\/div>\n\n        <\/div>\n\n\n        <div class=\"cg-comparison\">\n          <div class=\"cg-comparison-title\">\n            Capsule Volume Comparison\n          <\/div>\n\n          <div id=\"cg-size-comparison\"><\/div>\n        <\/div>\n\n      <\/div>\n\n\n      <div class=\"cg-formula\">\n        <strong>Formula:<\/strong><br>\n        Required Volume (mL) =\n        Target Fill Weight (mg) \u00f7\n        [Density (g\/mL) \u00d7 1,000]\n      <\/div>\n\n      <div class=\"cg-note\">\n        <strong>Planning estimate only.<\/strong>\n        Capsule volume and dimensions can vary by shell supplier.\n        Actual commercial fill also depends on the finished blend,\n        excipients, powder flow, shell specification and filling process.\n        Confirm the final size through formulation and trial-fill evaluation.\n      <\/div>\n\n    <\/section>\n\n\n\n    <!-- TAB 2: ESTIMATE FILL WEIGHT -->\n    <section\n      class=\"cg-panel\"\n      id=\"cg-panel-weight\"\n      role=\"tabpanel\"\n      aria-labelledby=\"cg-tab-weight\">\n\n      <div class=\"cg-grid\">\n\n        <div class=\"cg-field\">\n          <label for=\"cg-capsule-select\">\n            Capsule Size\n          <\/label>\n\n          <select id=\"cg-capsule-select\">\n            <option value=\"000\">Size 000<\/option>\n            <option value=\"00\" selected>Size 00<\/option>\n            <option value=\"0\">Size 0<\/option>\n            <option value=\"1\">Size 1<\/option>\n            <option value=\"2\">Size 2<\/option>\n            <option value=\"3\">Size 3<\/option>\n            <option value=\"4\">Size 4<\/option>\n            <option value=\"5\">Size 5<\/option>\n          <\/select>\n\n          <span class=\"cg-field-note\">\n            Uses the nominal reference volumes listed in this article.\n          <\/span>\n        <\/div>\n\n\n        <div class=\"cg-field\">\n          <label for=\"cg-density-weight\">\n            Formulation Density (g\/mL)\n          <\/label>\n\n          <input\n            id=\"cg-density-weight\"\n            type=\"number\"\n            inputmode=\"decimal\"\n            min=\"0.05\"\n            max=\"5\"\n            step=\"0.01\"\n            value=\"0.80\">\n\n          <div class=\"cg-density-presets\" aria-label=\"Density examples\">\n            <button\n              type=\"button\"\n              class=\"cg-preset cg-preset-weight\"\n              data-density=\"0.4\">\n              0.4 Low\n            <\/button>\n\n            <button\n              type=\"button\"\n              class=\"cg-preset cg-preset-weight\"\n              data-density=\"0.6\">\n              0.6\n            <\/button>\n\n            <button\n              type=\"button\"\n              class=\"cg-preset cg-preset-weight\"\n              data-density=\"0.8\">\n              0.8\n            <\/button>\n\n            <button\n              type=\"button\"\n              class=\"cg-preset cg-preset-weight\"\n              data-density=\"1.0\">\n              1.0\n            <\/button>\n\n            <button\n              type=\"button\"\n              class=\"cg-preset cg-preset-weight\"\n              data-density=\"1.2\">\n              1.2 High\n            <\/button>\n          <\/div>\n\n        <\/div>\n\n      <\/div>\n\n\n      <div class=\"cg-actions\">\n        <button type=\"button\" class=\"cg-button\" id=\"cg-calculate-weight\">\n          Estimate Fill Weight\n        <\/button>\n      <\/div>\n\n\n      <div class=\"cg-error\" id=\"cg-weight-error\" role=\"alert\"><\/div>\n\n\n      <div\n        class=\"cg-result\"\n        id=\"cg-weight-result\"\n        aria-live=\"polite\">\n\n        <div class=\"cg-result-main\">\n\n          <div class=\"cg-result-eyebrow\">\n            Estimated Theoretical Fill Weight\n          <\/div>\n\n          <div class=\"cg-result-value\" id=\"cg-fill-weight\">\n            \u2014\n          <\/div>\n\n          <p class=\"cg-result-sub\" id=\"cg-weight-message\"><\/p>\n\n          <div class=\"cg-result-stats\">\n\n            <div class=\"cg-stat\">\n              <span class=\"cg-stat-label\">\n                Capsule Size\n              <\/span>\n              <span class=\"cg-stat-value\" id=\"cg-output-size\">\n                \u2014\n              <\/span>\n            <\/div>\n\n            <div class=\"cg-stat\">\n              <span class=\"cg-stat-label\">\n                Nominal Volume\n              <\/span>\n              <span class=\"cg-stat-value\" id=\"cg-output-volume\">\n                \u2014\n              <\/span>\n            <\/div>\n\n            <div class=\"cg-stat\">\n              <span class=\"cg-stat-label\">\n                Density Used\n              <\/span>\n              <span class=\"cg-stat-value\" id=\"cg-output-density\">\n                \u2014\n              <\/span>\n            <\/div>\n\n          <\/div>\n\n        <\/div>\n\n      <\/div>\n\n\n      <div class=\"cg-formula\">\n        <strong>Formula:<\/strong><br>\n        Estimated Fill Weight (mg) =\n        Capsule Volume (mL) \u00d7\n        Density (g\/mL) \u00d7 1,000\n      <\/div>\n\n\n      <div class=\"cg-table-wrap\">\n        <table>\n          <thead>\n            <tr>\n              <th>Capsule Size<\/th>\n              <th>Nominal Volume<\/th>\n              <th>Approx. Locked Length<\/th>\n            <\/tr>\n          <\/thead>\n\n          <tbody>\n            <tr>\n              <td>000<\/td>\n              <td>1.37 mL<\/td>\n              <td>26.1 mm<\/td>\n            <\/tr>\n            <tr>\n              <td>00<\/td>\n              <td>0.91 mL<\/td>\n              <td>23.3 mm<\/td>\n            <\/tr>\n            <tr>\n              <td>0<\/td>\n              <td>0.68 mL<\/td>\n              <td>21.7 mm<\/td>\n            <\/tr>\n            <tr>\n              <td>1<\/td>\n              <td>0.50 mL<\/td>\n              <td>19.4 mm<\/td>\n            <\/tr>\n            <tr>\n              <td>2<\/td>\n              <td>0.37 mL<\/td>\n              <td>18.0 mm<\/td>\n            <\/tr>\n            <tr>\n              <td>3<\/td>\n              <td>0.30 mL<\/td>\n              <td>15.9 mm<\/td>\n            <\/tr>\n            <tr>\n              <td>4<\/td>\n              <td>0.25 mL<\/td>\n              <td>14.3 mm<\/td>\n            <\/tr>\n            <tr>\n              <td>5<\/td>\n              <td>0.13 mL<\/td>\n              <td>11.1 mm<\/td>\n            <\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n\n\n      <div class=\"cg-note\">\n        <strong>Reference values only.<\/strong>\n        Nominal capsule dimensions and volumes can vary slightly by\n        shell manufacturer and specification. The calculated weight is\n        theoretical and should not be represented as a guaranteed production fill.\n      <\/div>\n\n    <\/section>\n\n\n    <div class=\"cg-footer-note\">\n      This calculator is intended for preliminary formulation planning.\n      It does not replace evaluation of the actual finished blend,\n      capsule-shell specification or production filling process.\n    <\/div>\n\n  <\/div>\n\n\n  <script>\n    (function () {\n\n      const root = document.getElementById('cg-capsule-calculator');\n\n      if (!root || root.dataset.initialized === 'true') {\n        return;\n      }\n\n      root.dataset.initialized = 'true';\n\n\n      \/* ---------------------------------------------\n         Nominal capsule reference values\n         --------------------------------------------- *\/\n\n      const capsuleData = [\n        { size: '5',   volume: 0.13, length: 11.1 },\n        { size: '4',   volume: 0.25, length: 14.3 },\n        { size: '3',   volume: 0.30, length: 15.9 },\n        { size: '2',   volume: 0.37, length: 18.0 },\n        { size: '1',   volume: 0.50, length: 19.4 },\n        { size: '0',   volume: 0.68, length: 21.7 },\n        { size: '00',  volume: 0.91, length: 23.3 },\n        { size: '000', volume: 1.37, length: 26.1 }\n      ];\n\n\n      \/* ---------------------------------------------\n         Helpers\n         --------------------------------------------- *\/\n\n      function formatNumber(number, decimals) {\n        return Number(number).toLocaleString(\n          'en-US',\n          {\n            minimumFractionDigits: decimals,\n            maximumFractionDigits: decimals\n          }\n        );\n      }\n\n\n      function showError(element, message) {\n        element.textContent = message;\n        element.style.display = 'block';\n      }\n\n\n      function clearError(element) {\n        element.textContent = '';\n        element.style.display = 'none';\n      }\n\n\n      function getCapsule(size) {\n        return capsuleData.find(function (item) {\n          return item.size === size;\n        });\n      }\n\n\n      \/* ---------------------------------------------\n         Tabs\n         --------------------------------------------- *\/\n\n      const tabs = root.querySelectorAll('.cg-tab');\n      const panels = root.querySelectorAll('.cg-panel');\n\n      tabs.forEach(function (tab) {\n\n        tab.addEventListener('click', function () {\n\n          const targetId = tab.getAttribute('aria-controls');\n\n          tabs.forEach(function (item) {\n            item.classList.remove('is-active');\n            item.setAttribute('aria-selected', 'false');\n          });\n\n          panels.forEach(function (panel) {\n            panel.classList.remove('is-active');\n          });\n\n          tab.classList.add('is-active');\n          tab.setAttribute('aria-selected', 'true');\n\n          const target = root.querySelector('#' + targetId);\n\n          if (target) {\n            target.classList.add('is-active');\n          }\n\n        });\n\n      });\n\n\n      \/* ---------------------------------------------\n         Density preset buttons\n         --------------------------------------------- *\/\n\n      root.querySelectorAll(\n        '.cg-preset:not(.cg-preset-weight)'\n      ).forEach(function (button) {\n\n        button.addEventListener('click', function () {\n          root.querySelector('#cg-density-size').value =\n            button.dataset.density;\n        });\n\n      });\n\n\n      root.querySelectorAll(\n        '.cg-preset-weight'\n      ).forEach(function (button) {\n\n        button.addEventListener('click', function () {\n          root.querySelector('#cg-density-weight').value =\n            button.dataset.density;\n        });\n\n      });\n\n\n      \/* ---------------------------------------------\n         Calculator 1: Find starting capsule size\n         --------------------------------------------- *\/\n\n      const targetWeightInput =\n        root.querySelector('#cg-target-weight');\n\n      const densitySizeInput =\n        root.querySelector('#cg-density-size');\n\n      const calculateSizeButton =\n        root.querySelector('#cg-calculate-size');\n\n      const sizeError =\n        root.querySelector('#cg-size-error');\n\n      const sizeResult =\n        root.querySelector('#cg-size-result');\n\n\n      function calculateStartingSize() {\n\n        clearError(sizeError);\n\n        const targetWeight =\n          parseFloat(targetWeightInput.value);\n\n        const density =\n          parseFloat(densitySizeInput.value);\n\n\n        if (\n          !Number.isFinite(targetWeight) ||\n          targetWeight <= 0\n        ) {\n          sizeResult.classList.remove('is-visible');\n          showError(\n            sizeError,\n            'Please enter a target fill weight greater than 0 mg.'\n          );\n          return;\n        }\n\n\n        if (\n          !Number.isFinite(density) ||\n          density <= 0 ||\n          density > 5\n        ) {\n          sizeResult.classList.remove('is-visible');\n          showError(\n            sizeError,\n            'Please enter a formulation density greater than 0 and no more than 5 g\/mL.'\n          );\n          return;\n        }\n\n\n        const requiredVolume =\n          targetWeight \/ (density * 1000);\n\n\n        const selectedCapsule =\n          capsuleData.find(function (capsule) {\n            return capsule.volume >= requiredVolume;\n          });\n\n\n        const sizeName =\n          root.querySelector('#cg-size-name');\n\n        const sizeMessage =\n          root.querySelector('#cg-size-message');\n\n        const requiredVolumeOutput =\n          root.querySelector('#cg-required-volume');\n\n        const selectedVolumeOutput =\n          root.querySelector('#cg-selected-volume');\n\n        const volumeMarginOutput =\n          root.querySelector('#cg-volume-margin');\n\n\n        requiredVolumeOutput.textContent =\n          formatNumber(requiredVolume, 3) + ' mL';\n\n\n        if (selectedCapsule) {\n\n          const margin =\n            selectedCapsule.volume - requiredVolume;\n\n          const marginPercent =\n            selectedCapsule.volume > 0\n              ? (margin \/ selectedCapsule.volume) * 100\n              : 0;\n\n\n          sizeName.textContent =\n            'Size ' + selectedCapsule.size;\n\n\n          selectedVolumeOutput.textContent =\n            formatNumber(selectedCapsule.volume, 2) + ' mL';\n\n\n          volumeMarginOutput.textContent =\n            formatNumber(margin, 3) +\n            ' mL (' +\n            formatNumber(marginPercent, 1) +\n            '%)';\n\n\n          sizeMessage.textContent =\n            'This is the smallest nominal reference size in this chart ' +\n            'whose listed volume is equal to or greater than the calculated ' +\n            'volume requirement. Confirm with the actual finished blend before production.';\n\n        } else {\n\n          sizeName.textContent =\n            'More than Size 000 volume required';\n\n\n          selectedVolumeOutput.textContent =\n            '> 1.37 mL';\n\n\n          volumeMarginOutput.textContent =\n            'Single standard reference capsule not identified';\n\n\n          sizeMessage.textContent =\n            'The calculated formulation volume exceeds the nominal 1.37 mL ' +\n            'reference volume of Size 000. Consider evaluating multiple capsules ' +\n            'per serving, formulation changes, or another dosage format.';\n\n        }\n\n\n        renderComparison(\n          requiredVolume,\n          selectedCapsule\n            ? selectedCapsule.size\n            : null\n        );\n\n\n        sizeResult.classList.add('is-visible');\n\n      }\n\n\n      function renderComparison(\n        requiredVolume,\n        selectedSize\n      ) {\n\n        const container =\n          root.querySelector('#cg-size-comparison');\n\n        container.innerHTML = '';\n\n\n        const maxVolume =\n          Math.max.apply(\n            null,\n            capsuleData.map(function (item) {\n              return item.volume;\n            })\n          );\n\n\n        capsuleData\n          .slice()\n          .reverse()\n          .forEach(function (capsule) {\n\n            const row =\n              document.createElement('div');\n\n            row.className = 'cg-size-row';\n\n\n            if (capsule.size === selectedSize) {\n              row.classList.add('is-selected');\n            }\n\n\n            const label =\n              document.createElement('div');\n\n            label.textContent =\n              'Size ' + capsule.size;\n\n\n            const barWrap =\n              document.createElement('div');\n\n            barWrap.className =\n              'cg-size-bar-wrap';\n\n\n            const bar =\n              document.createElement('span');\n\n            bar.className =\n              'cg-size-bar';\n\n            bar.style.width =\n              ((capsule.volume \/ maxVolume) * 100) + '%';\n\n\n            barWrap.appendChild(bar);\n\n\n            const status =\n              document.createElement('div');\n\n            status.className =\n              'cg-status';\n\n\n            if (capsule.volume >= requiredVolume) {\n\n              status.textContent =\n                formatNumber(capsule.volume, 2) +\n                ' mL \u2713';\n\n            } else {\n\n              status.textContent =\n                formatNumber(capsule.volume, 2) +\n                ' mL \u2014';\n\n            }\n\n\n            row.appendChild(label);\n            row.appendChild(barWrap);\n            row.appendChild(status);\n\n            container.appendChild(row);\n\n          });\n\n      }\n\n\n      calculateSizeButton.addEventListener(\n        'click',\n        calculateStartingSize\n      );\n\n\n      \/* ---------------------------------------------\n         Calculator 2: Estimate fill weight\n         --------------------------------------------- *\/\n\n      const capsuleSelect =\n        root.querySelector('#cg-capsule-select');\n\n      const densityWeightInput =\n        root.querySelector('#cg-density-weight');\n\n      const calculateWeightButton =\n        root.querySelector('#cg-calculate-weight');\n\n      const weightError =\n        root.querySelector('#cg-weight-error');\n\n      const weightResult =\n        root.querySelector('#cg-weight-result');\n\n\n      function calculateFillWeight() {\n\n        clearError(weightError);\n\n\n        const capsule =\n          getCapsule(capsuleSelect.value);\n\n        const density =\n          parseFloat(densityWeightInput.value);\n\n\n        if (!capsule) {\n\n          weightResult.classList.remove('is-visible');\n\n          showError(\n            weightError,\n            'Please choose a valid capsule size.'\n          );\n\n          return;\n        }\n\n\n        if (\n          !Number.isFinite(density) ||\n          density <= 0 ||\n          density > 5\n        ) {\n\n          weightResult.classList.remove('is-visible');\n\n          showError(\n            weightError,\n            'Please enter a formulation density greater than 0 and no more than 5 g\/mL.'\n          );\n\n          return;\n        }\n\n\n        const estimatedWeight =\n          capsule.volume *\n          density *\n          1000;\n\n\n        root.querySelector(\n          '#cg-fill-weight'\n        ).textContent =\n          formatNumber(estimatedWeight, 0) + ' mg';\n\n\n        root.querySelector(\n          '#cg-output-size'\n        ).textContent =\n          'Size ' + capsule.size;\n\n\n        root.querySelector(\n          '#cg-output-volume'\n        ).textContent =\n          formatNumber(capsule.volume, 2) + ' mL';\n\n\n        root.querySelector(\n          '#cg-output-density'\n        ).textContent =\n          formatNumber(density, 2) + ' g\/mL';\n\n\n        root.querySelector(\n          '#cg-weight-message'\n        ).textContent =\n          'Theoretical estimate based on nominal capsule volume \u00d7 entered formulation density.';\n\n\n        weightResult.classList.add('is-visible');\n\n      }\n\n\n      calculateWeightButton.addEventListener(\n        'click',\n        calculateFillWeight\n      );\n\n\n      \/* ---------------------------------------------\n         Enter key support\n         --------------------------------------------- *\/\n\n      [\n        targetWeightInput,\n        densitySizeInput\n      ].forEach(function (input) {\n\n        input.addEventListener(\n          'keydown',\n          function (event) {\n\n            if (event.key === 'Enter') {\n              event.preventDefault();\n              calculateStartingSize();\n            }\n\n          }\n        );\n\n      });\n\n\n      densityWeightInput.addEventListener(\n        'keydown',\n        function (event) {\n\n          if (event.key === 'Enter') {\n            event.preventDefault();\n            calculateFillWeight();\n          }\n\n        }\n      );\n\n\n      \/* Initial result *\/\n      calculateStartingSize();\n      calculateFillWeight();\n\n    })();\n  <\/script>\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Do_Gelatin_and_HPMC_Capsules_Use_the_Same_Size_System\"><\/span>Do Gelatin and HPMC Capsules Use the Same Size System?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Gelatin and HPMC hard capsules generally use the familiar numerical size system, including Sizes 000, 00, 0, 1, 2, 3, 4 and 5.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, using the same size number does not mean every supplier&#8217;s capsule is identical.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Depending on the product and manufacturer, there can be differences in:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">dimensional tolerances;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">shell weight;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">moisture characteristics;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">material behavior; and<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">filling performance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For commercial production, the shell specification actually selected for the project should therefore be used when confirming capsule size and process compatibility.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Related Guide: Gelatin vs HPMC Capsules<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Choosing_Capsule_Size_for_a_Commercial_Supplement_Formula\"><\/span>Choosing Capsule Size for a Commercial Supplement Formula<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">For a commercial dietary supplement project, capsule size affects more than the theoretical amount of powder that fits into the shell.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Complete_Formula_Volume\"><\/span>1. Complete Formula Volume<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Active ingredients are not the only materials that occupy capsule space.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The final formulation may also contain excipients used to support flow, processing, stability or manufacturing performance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Capsule selection should therefore be based on the <strong>complete finished blend<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_Capsules_per_Serving\"><\/span>2. Capsules per Serving<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If the intended dose does not fit inside one capsule, the product may require either:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">a larger capsule;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">a lower fill weight per capsule; or<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">multiple capsules per serving.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This is both a formulation and product-positioning decision.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_Packaging_Configuration\"><\/span>3. Packaging Configuration<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Capsule size and capsules-per-serving can affect:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">bottle selection;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">count per bottle;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">packaging dimensions; and<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">overall product configuration.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A formulation decision can therefore influence packaging decisions later in development.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_Manufacturing_Validation\"><\/span>4. Manufacturing Validation<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A density calculation can narrow down the likely capsule-size range.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It does not replace production validation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The finished blend should ultimately be assessed using the shell specification and filling equipment intended for manufacturing.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"545\" src=\"https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/capsule-supplement-development-workflow.webp\" alt=\"Commercial capsule supplement development process from formulation to production\n\" class=\"wp-image-25782\" srcset=\"https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/capsule-supplement-development-workflow.webp 1000w, https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/capsule-supplement-development-workflow-300x164.webp 300w, https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/capsule-supplement-development-workflow-18x10.webp 18w, https:\/\/collagensei.com\/wp-content\/uploads\/2026\/06\/capsule-supplement-development-workflow-767x418.webp 767w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Developing_a_Capsule_Supplement\"><\/span>Developing a Capsule Supplement?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If you are developing a commercial capsule product, GENSEI can support projects involving capsule formulation, ingredient sourcing and finished-product manufacturing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you already have a formula, we can review the project requirements and capsule-format feasibility.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If you are starting with a product concept, formulation development can help determine dose, ingredient compatibility, capsule size and manufacturing requirements before commercial production.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Explore <a class=\"wpil_keyword_link\" href=\"https:\/\/collagensei.com\/how-is-capsule-supplement-manufacturing\/\" target=\"_blank\"  rel=\"noopener\" title=\"How Is Capsule Supplement Manufacturing\" data-wpil-keyword-link=\"linked\"  data-wpil-monitor-id=\"4028\">Capsule Supplement Manufacturing<\/a> \u2192<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Discuss a Custom Formula \u2192<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions_About_Capsule_Sizes\"><\/span>Frequently Asked Questions About Capsule Sizes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_the_largest_capsule_size\"><\/span>What is the largest capsule size?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Size 000 is the largest capsule in the standard 000-to-5 hard-capsule reference range.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Commonly published reference specifications give Size 000 a nominal volume of approximately <strong>1.37 mL<\/strong> and a locked length of approximately <strong>26.1 mm<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Actual specifications should be confirmed with the selected capsule supplier.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_the_smallest_capsule_size\"><\/span>What is the smallest capsule size?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Size 5 is the smallest capsule in the standard 000-to-5 reference range.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Common reference specifications give it a nominal internal volume of approximately <strong>0.13 mL<\/strong> and a locked length of approximately <strong>11.1 mm<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"How_many_mg_fit_in_a_Size_00_capsule\"><\/span>How many mg fit in a Size 00 capsule?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">There is no single milligram capacity for Size 00 because powder density varies.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Using a nominal reference volume of approximately 0.91 mL:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">at 0.6 g\/mL, the theoretical fill weight is approximately <strong>546 mg<\/strong>;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">at 0.8 g\/mL, approximately <strong>728 mg<\/strong>;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">at 1.0 g\/mL, approximately <strong>910 mg<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Actual production capacity can differ depending on the finished formulation and filling process.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_is_the_difference_between_Size_0_and_Size_00\"><\/span>What is the difference between Size 0 and Size 00?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Size 00 is physically larger and provides more internal volume than Size 0.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Typical reference volumes are approximately:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Size 0: 0.68 mL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Size 00: 0.91 mL<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This gives Size 00 roughly one-third more nominal volume than Size 0.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The appropriate choice depends on formulation volume, serving design and production feasibility.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"What_capsule_size_is_needed_for_500_mg\"><\/span>What capsule size is needed for 500 mg?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">It depends on the density of the formulation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At a density of 1.0 g\/mL, 500 mg requires approximately <strong>0.50 mL<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At 0.8 g\/mL, it requires approximately <strong>0.625 mL<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At 0.6 g\/mL, it requires approximately <strong>0.833 mL<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The same 500 mg target may therefore require different capsule sizes.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Why_can_the_same_capsule_size_hold_different_milligram_amounts\"><\/span>Why can the same capsule size hold different milligram amounts?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Capsule size determines internal volume, while milligrams measure weight.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A denser powder places more mass into the same volume than a lighter, lower-density powder.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">That is why capsule fill capacity should be calculated using formulation density rather than one universal milligram value.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Do_gelatin_and_HPMC_capsules_use_the_same_size_numbers\"><\/span>Do gelatin and HPMC capsules use the same size numbers?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Generally, yes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Both gelatin and HPMC hard capsules commonly use the standard capsule-size numbering system.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">However, exact dimensions, tolerances and shell properties can vary according to the capsule product and supplier.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Commercial manufacturing should therefore use the specification for the shell actually selected.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Capsule size should be selected by <strong>volume first and milligrams second<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Sizes 000 through 5 provide progressively smaller internal volumes, but there is no universal milligram capacity for any capsule size.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The actual fill weight depends on the properties of the finished formulation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A capsule size chart, density measurement and fill-weight calculation can provide a useful starting point during product development.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Final commercial selection should then be confirmed using:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">the complete finished blend;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">the selected capsule-shell specification; and<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">the intended filling process.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For supplement brands developing a capsule product, this approach helps connect formulation requirements with capsule selection before commercial production.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/collagensei.com\/capsule-supplement-manufacturer\/\" target=\"_blank\" rel=\"noreferrer noopener\">Explore Capsule Supplement Manufacturing \u2192<\/a><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><a href=\"https:\/\/collagensei.com\/custom-formula-supplement-manufacturer\/\" target=\"_blank\" rel=\"noreferrer noopener\">Discuss a Custom Formulation Project \u2192<\/a><\/strong><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"References\"><\/span>References<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1. United States Pharmacopeia (USP). General Chapter <code>&lt;616><\/code> \u2014 Bulk Density of Powders.<\/li>\n\n\n\n<li>2. Franc A, Vetch\u00fd D, F\u00fcl\u00f6pov\u00e1 N. Commercially Available Enteric Empty Hard Capsules, Production Technology and Application. <em>Pharmaceuticals<\/em>. 2022;15(11):1398.<\/li>\n\n\n\n<li>3. Fauzi MARD, Pudjiastuti P, Wibowo AC, Hendradi E. Preparation, Properties and Potential of Carrageenan-Based Hard Capsules for Replacing Gelatine: A Review. <em>Polymers<\/em>. 2021;13(16):2666.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Choosing a capsule size starts with volume\u2014not a fixed milligram number. Hard capsules are manufactured in standard size ranges, but [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":20055,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[655],"tags":[],"class_list":["post-12896","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-manufacturing-formulation"],"uagb_featured_image_src":{"full":["https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/size-0-vs-00-capsule-comparison-scaled.webp",2560,1396,false],"thumbnail":["https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/size-0-vs-00-capsule-comparison-150x150.webp",150,150,true],"medium":["https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/size-0-vs-00-capsule-comparison-300x164.webp",300,164,true],"medium_large":["https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/size-0-vs-00-capsule-comparison-768x419.webp",768,419,true],"large":["https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/size-0-vs-00-capsule-comparison-1024x559.webp",1024,559,true],"1536x1536":["https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/size-0-vs-00-capsule-comparison-1536x838.webp",1536,838,true],"2048x2048":["https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/size-0-vs-00-capsule-comparison-2048x1117.webp",2048,1117,true],"trp-custom-language-flag":["https:\/\/collagensei.com\/wp-content\/uploads\/2025\/11\/size-0-vs-00-capsule-comparison-18x10.webp",18,10,true]},"uagb_author_info":{"display_name":"Warren Wan","author_link":"https:\/\/collagensei.com\/vi\/author\/w-wenyang\/"},"uagb_comment_info":0,"uagb_excerpt":"Choosing a capsule size starts with volume\u2014not a fixed milligram number. Hard capsules are manufactured in standard size ranges, but [&hellip;]","_links":{"self":[{"href":"https:\/\/collagensei.com\/vi\/wp-json\/wp\/v2\/posts\/12896","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/collagensei.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/collagensei.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/collagensei.com\/vi\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/collagensei.com\/vi\/wp-json\/wp\/v2\/comments?post=12896"}],"version-history":[{"count":41,"href":"https:\/\/collagensei.com\/vi\/wp-json\/wp\/v2\/posts\/12896\/revisions"}],"predecessor-version":[{"id":25795,"href":"https:\/\/collagensei.com\/vi\/wp-json\/wp\/v2\/posts\/12896\/revisions\/25795"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/collagensei.com\/vi\/wp-json\/wp\/v2\/media\/20055"}],"wp:attachment":[{"href":"https:\/\/collagensei.com\/vi\/wp-json\/wp\/v2\/media?parent=12896"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/collagensei.com\/vi\/wp-json\/wp\/v2\/categories?post=12896"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/collagensei.com\/vi\/wp-json\/wp\/v2\/tags?post=12896"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}