{"id":55828,"date":"2015-10-24T15:57:59","date_gmt":"2015-10-24T13:57:59","guid":{"rendered":"http:\/\/wpcalc.com\/?p=55828"},"modified":"2026-09-28T09:21:25","modified_gmt":"2026-09-28T06:21:25","slug":"gsm-of-knitted-fabric","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/converters\/gsm-of-knitted-fabric\/","title":{"rendered":"GSM of Knitted Fabric Calculation"},"content":{"rendered":"<section class=\"not-prose calculator-box\" aria-labelledby=\"calculator-title\"><div class=\"flex items-baseline sm:items-center justify-between gap-2 sm:gap-3\"><div class=\"flex flex-col sm:flex-row sm:items-center gap-2\"><span class=\"icon icon-calculator text-primary-700! text-base! dark:text-primary-300!\" aria-hidden=\"true\"><\/span><h2 id=\"calculator-title\" class=\"text-lg font-display font-bold\">Knitted Fabric Weight (GSM) Estimator<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"55828\" data-favorite-title=\"Knitted Fabric GSM\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/converters\/gsm-of-knitted-fabric\/\" data-favorite-excerpt=\"Enter courses per inch, stitch length in centimeters, and yarn tex to calculate the value returned by this knitted fabric GSM formula. Check the limitations before treating it as a measured fabric weight.\" aria-label=\"Add to Favorites\" data-favorite-icon=\"icon icon-other\">\n    <span class=\"icon icon-shape-star-empty\" aria-hidden=\"true\"><\/span>\n  <\/button>\n  <div class=\"calcdash-favorite__tip\" aria-hidden=\"true\">\n   <span class=\"favorite-tooltip\" id=\"favorite-tooltip\"><\/span>\n  <\/div>\n  <span class=\"sr-only\" role=\"status\" id=\"favorite-status\"><\/span>\n<\/div><\/div><form action=\"https:\/\/wpcalc.com\/en\/converters\/gsm-of-knitted-fabric\/\" method=\"POST\" class=\"calculator\" id=\"calculator-55828\" data-post=\"55828\"><fieldset class=\"fieldset-input\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"field has-term\" id=\"input-1\"><label for=\"field-1\">Course Per Inch (CPI)<\/label><div class=\"term\">CPI<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><input type=\"text\" name=\"course_per_inch_cpi\" id=\"field-1\" aria-describedby=\"calc-info-1\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"40\"\/><small id=\"calc-info-1\">Number of courses per inch in the fabric<\/small><\/div><div class=\"field has-term\" id=\"input-2\"><label for=\"field-2\">Stitch Length (cm)<\/label><div class=\"term\">SL<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><input type=\"text\" name=\"stitch_length_cm\" id=\"field-2\" aria-describedby=\"calc-info-2\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"0.25\"\/><small id=\"calc-info-2\">Length of one stitch in centimeters<\/small><\/div><div class=\"field has-term\" id=\"input-3\"><label for=\"field-3\">Tex<\/label><div class=\"term\">Tex<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><input type=\"text\" name=\"tex\" id=\"field-3\" aria-describedby=\"calc-info-3\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"30\"\/><small id=\"calc-info-3\">Linear density of yarn in tex<\/small><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Re-Calculate\" id=\"calculate-button\" data-post=\"55828\">Calculate<\/button><button type=\"reset\">Reset<\/button><\/div><div class=\"field is-checkbox hidden!\" id=\"field-auto-calc\"><input type=\"checkbox\" id=\"auto-calc\"><label for=\"auto-calc\">Calculate automatically<\/label><small>If enabled, the result will update automatically when you change any value.<\/small><\/div><div class=\"fieldset-result is-hidden\" aria-labelledby=\"result-title\" aria-live=\"polite\" role=\"region\"> <h3 class=\"result-title bg-gradient-to-r from-primary-50 to-gray-50 dark:from-primary-900 dark:to-gray-800\" id=\"result-title\"><span class=\"icon icon-s-pulse\" aria-hidden=\"true\"><\/span> Your Results<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>GSM (g\/m\u00b2)<\/span><span class=\"result-term\">GSM<\/span><\/span><span class=\"field-value\" id=\"result-1\" data-unit=\"g\/m\u00b2\"><\/span><button type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><\/div><div class=\"result-actions\"><button type=\"button\" class=\"copy-link\"><svg viewBox=\"0 0 20 20\" fill=\"currentColor\" aria-hidden=\"true\"><path d=\"M12.232 4.232a2.5 2.5 0 0 1 3.536 3.536l-1.225 1.224a.75.75 0 0 0 1.061 1.06l1.224-1.224a4 4 0 0 0-5.656-5.656l-3 3a4 4 0 0 0 .225 5.865.75.75 0 0 0 .977-1.138 2.5 2.5 0 0 1-.142-3.667l3-3Z\"\/><path d=\"M11.603 7.963a.75.75 0 0 0-.977 1.138 2.5 2.5 0 0 1 .142 3.667l-3 3a2.5 2.5 0 0 1-3.536-3.536l1.225-1.224a.75.75 0 0 0-1.061-1.06l-1.224 1.224a4 4 0 1 0 5.656 5.656l3-3a4 4 0 0 0-.225-5.865Z\"\/><\/svg><span class=\"copy-link__text\">Copy link to this calculation<\/span><\/button><span class=\"sr-only\" role=\"status\" id=\"copy-link-status\"><\/span><\/div><\/div><a href=\"#respond\" class=\"hidden transition-opacity duration-300 opacity-0 w-50 text-sm justify-center items-center gap-2 px-4 py-2 rounded bg-gray-200 text-gray-700 hover:bg-gray-300\" id=\"leave-comment\"><span class=\"icon icon-comments\" aria-hidden=\"true\"><\/span>Leave a Comment<\/a><\/form><\/section><section id=\"calc-reactions\" class=\"not-prose hidden my-12 bg-gradient-to-r from-primary-50 to-gray-50 border border-indigo-100 rounded-xl px-6 py-4 shadow-sm\" data-post=\"55828\" aria-live=\"polite\" aria-labelledby=\"calc-reactions-title\"><p id=\"calc-reactions-title\" class=\"text-sm text-gray-500 text-center mb-2\">How did this result make you feel?<\/p><div role=\"group\" aria-labelledby=\"calc-reactions-title\" class=\"grid grid-cols-3 sm:flex sm:flex-row sm:justify-around gap-4 sm:items-center sm:flex-wrap\"><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"like\"><span class=\"reaction-count\" data-reaction-count=\"like\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude00 <\/span><span class=\"reaction-description font-medium\">Like <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"helpful\"><span class=\"reaction-count\" data-reaction-count=\"helpful\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\udca1 <\/span><span class=\"reaction-description font-medium\">Helpful <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"confused\"><span class=\"reaction-count\" data-reaction-count=\"confused\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude15 <\/span><span class=\"reaction-description font-medium\">Confused <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"disappointed\"><span class=\"reaction-count\" data-reaction-count=\"disappointed\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude1e <\/span><span class=\"reaction-description font-medium\">Disappointed <\/span><\/button><button type=\"button\" aria-pressed=\"false\" class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"inaccurate\"><span class=\"reaction-count\" data-reaction-count=\"inaccurate\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\u274c <\/span><span class=\"reaction-description font-medium\">Inaccurate <\/span><\/button><\/div><div id=\"reaction-message\" class=\"hidden mt-8 rounded-md border border-primary-100 bg-white\/50 backdrop-blur-sm px-4 py-2 text-sm text-center shadow-sm\"><\/div><\/section><div class=\"calcdash-ad not-prose calcdash-ad--calc_result calcdash-ad--in-article\"><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1721569815777345\" data-ad-slot=\"6317458308\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script><\/div>\n<style id=\"wpcoderpro-inline-1\">.formula-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section class=\"formula-box\" aria-labelledby=\"formula-title\">\r\n\t<div id=\"formula-title\" class=\"not-prose font-display mb-4\"><span class=\"icon icon-formula\" aria-hidden=\"true\"><\/span><h2>Knitted Fabric GSM Formula<\/h2><\/div>\r\n\t<figure class=\"not-prose formula\">\r\n\t\t<figcaption class=\"formula-title\">Formula<\/figcaption>\r\n\t\t<div class=\"text-base text-gray-800\" id=\"formula\">\n\\[\\mathrm{GSM}_{\\mathrm{calculator}}=\\frac{\\mathrm{CPI}\\times\\mathrm{SL}\\times\\mathrm{Tex}\\times1.09}{1000}\\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Where:<\/strong><\/p>\n<ul>\n<li>\\(\\mathrm{CPI}\\) \u2014 courses per inch of fabric<\/li>\n<li>\\(\\mathrm{SL}\\) \u2014 stitch length in centimeters<\/li>\n<li>\\(\\mathrm{Tex}\\) \u2014 yarn linear density in grams per 1,000 meters<\/li>\n<li>\\(1.09\\) \u2014 the fixed factor used by this calculator<\/li>\n<\/ul>\n<p>This is the formula implemented by the calculator; its result is rounded to two decimal places. The factor 1.09 is not a complete conversion from these inputs to grams per square meter, so the output should not be treated as a verified physical GSM measurement.<\/p>\n<p>\r\n<\/section>\n<style id=\"wpcoderpro-inline-459\">.calculation-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section id=\"calculation\" class=\"calculation-box\" aria-labelledby=\"calculation-title\">\r\n\t<div id=\"calculation-title\" class=\"not-prose font-display\"><span class=\"icon icon-unordered-list\" aria-hidden=\"true\"><\/span><h2>Knitted Fabric GSM \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> a knitted fabric has 40 courses per inch, a stitch length of 0.25 cm, and yarn with a linear density of 30 tex. These are the calculator\u2019s default inputs.<\/p>\n<p>\\[\\mathrm{GSM}_{\\mathrm{calculator}}=\\frac{40\\times0.25\\times30\\times1.09}{1000}=0.327\\]<\/p>\n<p><strong>Result:<\/strong> the calculator displays 0.33 g\/m\u00b2 after rounding. This is its formula output, not a reliable estimate of the fabric\u2019s actual GSM.<\/p>\n<p>\n\r\n<\/section>\n<h2>How to use the calculator<\/h2>\n<ol>\n<li>Enter the number of knitted courses in one inch of fabric in <strong>Course Per Inch (CPI)<\/strong>. Measure along the direction in which courses are counted, using a representative area of the fabric.<\/li>\n<li>Enter the length of yarn in one stitch in <strong>Stitch Length (cm)<\/strong>. Use centimeters, not millimeters or inches; for example, 2.5 mm is 0.25 cm.<\/li>\n<li>Enter the yarn\u2019s linear density in <strong>Tex<\/strong>. A yarn of 30 tex has a mass of 30 grams per 1,000 meters of yarn.<\/li>\n<li>Read <strong>GSM (g\/m\u00b2)<\/strong>. The displayed value is rounded to two decimal places. For production or specification decisions, verify fabric weight by weighing a sample of known area.<\/li>\n<\/ol>\n<h2>What knitted fabric GSM means<\/h2>\n<p>GSM stands for grams per square meter: the mass of fabric divided by its area. It is a measure of fabric weight per unit area, not a direct measure of thickness. Two fabrics can have the same GSM but feel different because their yarns, structures, finishes, and thicknesses differ. A higher measured GSM generally means more material in each square meter.<\/p>\n<p>Courses per inch describe the number of horizontal rows of stitches across an inch in the appropriate measuring direction. Stitch length describes how much yarn makes up a stitch, while tex describes the yarn\u2019s mass per unit length. Together, stitch length and tex help estimate yarn mass per stitch. To convert that into mass per fabric area, however, you also need the number of stitches per area.<\/p>\n<p>The calculator does not ask for wales per inch\u2014the number of stitch columns per inch. Without that measurement or an equivalent measure of stitch density, its three inputs cannot uniquely determine physical GSM. In particular, the default output of 0.33 g\/m\u00b2 should not be interpreted as the weight of a typical knitted fabric. The calculator can reproduce its stated formula, but it cannot replace a sample-weight test.<\/p>\n<h2>Assumptions, limitations, and a practical check<\/h2>\n<p>For a simplified theoretical estimate, measure both courses per inch (CPI) and wales per inch (WPI). If stitch length is the yarn length per stitch, and tex is in grams per 1,000 meters, their unit conversions give approximately:<\/p>\n<p>\\[\\mathrm{GSM}_{\\mathrm{theoretical}}\\approx0.0155\\times\\mathrm{CPI}\\times\\mathrm{WPI}\\times\\mathrm{SL}_{\\mathrm{cm}}\\times\\mathrm{Tex}\\]<\/p>\n<p>For example, using the default CPI, stitch length, and tex together with a separately measured WPI of 30 gives approximately \\(0.0155\\times40\\times30\\times0.25\\times30=139.5\\ \\mathrm{g\/m^2}\\). This is an illustration, not a corrected calculator result: the calculator has no WPI field. Actual weight may also differ because of yarn variation, knitting structure, moisture, finishing, and how the fabric was relaxed when measured.<\/p>\n<p>For a direct check, cut a representative piece, measure its area in square meters, and divide its mass in grams by that area. For instance, a 0.01 m\u00b2 sample weighing 1.40 g has a GSM of \\(1.40\/0.01=140\\ \\mathrm{g\/m^2}\\). Keep the sample flat and use a consistent conditioning and weighing method when comparing batches. If you need to check length units before recording measurements, use the <a href=\"https:\/\/wpcalc.com\/en\/converters\/meters-to-feet\/\">Meters to Feet converter<\/a>; the <a href=\"https:\/\/wpcalc.com\/en\/converters\/metric-prefix\/\">Metric Prefix converter<\/a> can help when converting millimeters to centimeters.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Enter courses per inch, stitch length in centimeters, and yarn tex to calculate the value returned by this knitted fabric GSM formula. Check the limitations before treating it as a measured fabric weight.<\/p>\n","protected":false},"author":70,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3],"tags":[31],"class_list":["post-55828","post","type-post","status-publish","format-standard","hentry","category-converters","tag-other-units"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55828","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/users\/70"}],"replies":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/comments?post=55828"}],"version-history":[{"count":2,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55828\/revisions"}],"predecessor-version":[{"id":65274,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55828\/revisions\/65274"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=55828"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=55828"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=55828"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}