{"id":55866,"date":"2015-11-06T12:37:11","date_gmt":"2015-11-06T10:37:11","guid":{"rendered":"http:\/\/wpcalc.com\/?p=55866"},"modified":"2026-09-28T09:29:30","modified_gmt":"2026-09-28T06:29:30","slug":"mass-flux-density","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/converters\/mass-flux-density\/","title":{"rendered":"Mass Flux Density Converter"},"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\">Convert Mass Flow Rate Between Units<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"55866\" data-favorite-title=\"Mass Flux Density\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/converters\/mass-flux-density\/\" data-favorite-excerpt=\"Convert mass flux density between kg\/m\u00b2\u00b7s, g\/cm\u00b2\u00b7s, kg\/m\u00b2\u00b7h, lb\/ft\u00b2\u00b7s, and lb\/ft\u00b2\u00b7h. Enter a value, then choose the units to convert from and to.\" aria-label=\"Add to Favorites\" data-favorite-icon=\"icon icon-physic\">\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\/mass-flux-density\/\" method=\"POST\" class=\"calculator\" id=\"calculator-55866\" data-post=\"55866\"><fieldset class=\"fieldset-input\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"field is-single\" id=\"input-1\"><label for=\"field-1\">Mass flux density value<\/label><input type=\"text\" name=\"mass_flux_density_value\" id=\"field-1\" aria-describedby=\"calc-unit-1 calc-info-1\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"5\"\/><div class=\"unit\" id=\"calc-unit-1\"><\/div><small id=\"calc-info-1\">Enter the mass flux per unit area to convert<\/small><\/div><div class=\"field\" id=\"input-2\"><label for=\"field-2\">From unit<\/label><div class=\"grid grid-cols-1\"><select id=\"field-2\" name=\"from_unit\"><option value=\"kg\/m\u00b2\u00b7s\">Kilogram per square meter per second (kg\/m\u00b2\u00b7s)<\/option><option value=\"g\/cm\u00b2\u00b7s\">Gram per square centimeter per second (g\/cm\u00b2\u00b7s)<\/option><option value=\"kg\/m\u00b2\u00b7h\">Kilogram per square meter per hour (kg\/m\u00b2\u00b7h)<\/option><option value=\"lb\/ft\u00b2\u00b7s\">Pound per square foot per second (lb\/ft\u00b2\u00b7s)<\/option><option value=\"lb\/ft\u00b2\u00b7h\">Pound per square foot per hour (lb\/ft\u00b2\u00b7h)<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><div class=\"field\" id=\"input-3\"><label for=\"field-3\">To unit<\/label><div class=\"grid grid-cols-1\"><select id=\"field-3\" name=\"to_unit\"><option value=\"kg\/m\u00b2\u00b7s\">Kilogram per square meter per second (kg\/m\u00b2\u00b7s)<\/option><option value=\"g\/cm\u00b2\u00b7s\">Gram per square centimeter per second (g\/cm\u00b2\u00b7s)<\/option><option value=\"kg\/m\u00b2\u00b7h\">Kilogram per square meter per hour (kg\/m\u00b2\u00b7h)<\/option><option value=\"lb\/ft\u00b2\u00b7s\">Pound per square foot per second (lb\/ft\u00b2\u00b7s)<\/option><option value=\"lb\/ft\u00b2\u00b7h\">Pound per square foot per hour (lb\/ft\u00b2\u00b7h)<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Re-Calculate\" id=\"calculate-button\" data-post=\"55866\">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>Converted Mass Flux Density<\/span><\/span><span class=\"field-value\" id=\"result-1\"><\/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=\"55866\" 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>Mass Flux Density 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\\[v_{\\mathrm{to}}=v_{\\mathrm{from}}\\frac{f_{\\mathrm{from}}}{f_{\\mathrm{to}}}\\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Where:<\/strong><\/p>\n<ul>\n<li>\\(v_{\\mathrm{from}}\\) \u2014 the entered mass flux density in the selected From unit.<\/li>\n<li>\\(v_{\\mathrm{to}}\\) \u2014 the converted mass flux density in the selected To unit.<\/li>\n<li>\\(f_{\\mathrm{from}}\\) and \\(f_{\\mathrm{to}}\\) \u2014 factors that convert each selected unit to kg\/m\u00b2\u00b7s.<\/li>\n<\/ul>\n<p>The converter first expresses the entered value in kg\/m\u00b2\u00b7s, then divides by the factor for the destination unit. This changes the units without changing the physical mass flux density.<\/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>Mass Flux Density \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> convert the default value of 5 kg\/m\u00b2\u00b7s to g\/cm\u00b2\u00b7s. One g\/cm\u00b2\u00b7s equals 10 kg\/m\u00b2\u00b7s, so the destination unit has a factor of 10.<\/p>\n<p>\\[v_{\\mathrm{to}}=5\\times\\frac{1}{10}=0.5\\ \\mathrm{g\/(cm^{2}\\cdot s)}\\]<\/p>\n<p><strong>Result:<\/strong> 5 kg\/m\u00b2\u00b7s = 0.5 g\/cm\u00b2\u00b7s.<\/p>\n<p>\n\r\n<\/section>\n<h2>How to use the calculator<\/h2>\n<ol>\n<li>Enter a nonnegative number in <strong>Mass flux density value<\/strong>. Enter the number only; select its unit separately.<\/li>\n<li>Choose the unit of that number in <strong>From unit<\/strong>.<\/li>\n<li>Choose the unit you need in <strong>To unit<\/strong>.<\/li>\n<li>Read the <strong>Converted Mass Flux Density<\/strong> result. Its unit is shown alongside the number.<\/li>\n<\/ol>\n<p>The default selections convert from kg\/m\u00b2\u00b7s to g\/cm\u00b2\u00b7s. You can also reverse the direction or choose the same unit in both menus to check an entered value.<\/p>\n<h2>What mass flux density means<\/h2>\n<p>Mass flux density describes how much mass passes through an area in a given time. For a flow passing uniformly and perpendicular to a surface, it is the mass flow rate divided by the surface area: \\(j_m=\\dot m\/A\\). For example, if 2 kg passes through each square meter every second, the mass flux density is 2 kg\/m\u00b2\u00b7s. The unit includes both area and time, so kg\/m\u00b2\u00b7h describes an hourly rate rather than a rate per second.<\/p>\n<p>This quantity helps compare flows through surfaces of different sizes. It is useful for membrane transport, filtration, evaporation, fluid flow, and other mass-transfer problems. If a uniform mass flux density and the relevant area are known, their product gives the total <a href=\"https:\/\/wpcalc.com\/en\/converters\/mass-flow-rate\/\">mass flow rate<\/a>. Dividing by area makes clear whether a larger total flow reflects more intense transport or simply a larger surface.<\/p>\n<p>Interpret the converted result as the same rate per unit area, written in another unit. A smaller numerical value does not mean less material is moving: 0.5 g\/cm\u00b2\u00b7s and 5 kg\/m\u00b2\u00b7s describe identical mass flux densities. In thermal analysis, the similarly named <a href=\"https:\/\/wpcalc.com\/en\/converters\/heat-flux-density\/\">heat flux density<\/a> instead measures energy transfer per unit area per unit time and cannot be converted directly into mass flux density.<\/p>\n<h2>Conversion factors and practical limits<\/h2>\n<p>The table shows the factors used by this calculator. Multiply a value by its factor to express it in kg\/m\u00b2\u00b7s; divide a value in kg\/m\u00b2\u00b7s by the factor to express it in the listed unit.<\/p>\n<table>\n<thead>\n<tr>\n<th>Unit<\/th>\n<th>Factor to kg\/m\u00b2\u00b7s<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>kg\/m\u00b2\u00b7s<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>g\/cm\u00b2\u00b7s<\/td>\n<td>10<\/td>\n<\/tr>\n<tr>\n<td>kg\/m\u00b2\u00b7h<\/td>\n<td>1\/3600<\/td>\n<\/tr>\n<tr>\n<td>lb\/ft\u00b2\u00b7s<\/td>\n<td>4.88243<\/td>\n<\/tr>\n<tr>\n<td>lb\/ft\u00b2\u00b7h<\/td>\n<td>4.88243\/3600<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The pound-to-kilogram and square-foot-to-square-meter conversion is represented here by the rounded factor 4.88243. The displayed result is rounded to no more than eight decimal places, so very small converted values may appear as zero and repeated conversions may not recover every digit. Use additional precision if a calculation is sensitive to small differences.<\/p>\n<p>The input accepts zero or positive values. A signed flux can be useful when direction matters, but this converter does not accept a negative input or specify a surface-normal direction. It also does not offer mg\/cm\u00b2\u00b7min; choose one of the five units shown in its menus. For nonuniform flow, a single mass flux density represents only the point or area average to which it applies. To find total flow across a surface with varying flux, account for how the flux changes across that surface rather than multiplying one local value by the entire area.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Convert mass flux density between kg\/m\u00b2\u00b7s, g\/cm\u00b2\u00b7s, kg\/m\u00b2\u00b7h, lb\/ft\u00b2\u00b7s, and lb\/ft\u00b2\u00b7h. Enter a value, then choose the units to convert from and to.<\/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":[34],"class_list":["post-55866","post","type-post","status-publish","format-standard","hentry","category-converters","tag-physics-units"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55866","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=55866"}],"version-history":[{"count":2,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55866\/revisions"}],"predecessor-version":[{"id":65294,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55866\/revisions\/65294"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=55866"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=55866"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=55866"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}