{"id":55814,"date":"2015-10-24T15:56:40","date_gmt":"2015-10-24T13:56:40","guid":{"rendered":"http:\/\/wpcalc.com\/?p=55814"},"modified":"2026-09-28T09:29:04","modified_gmt":"2026-09-28T06:29:04","slug":"mass-flow-rate","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/converters\/mass-flow-rate\/","title":{"rendered":"Mass Flow Rate 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=\"55814\" data-favorite-title=\"Mass Flow Rate\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/converters\/mass-flow-rate\/\" data-favorite-excerpt=\"Convert a mass flow rate between kg\/s, g\/s, kg\/min, kg\/h, lb\/s, lb\/min, lb\/h, and metric tons per hour. Enter a value and 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-flow-rate\/\" method=\"POST\" class=\"calculator\" id=\"calculator-55814\" data-post=\"55814\"><fieldset class=\"fieldset-input\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"field is-single\" id=\"input-1\"><label for=\"field-1\">Mass flow rate value<\/label><input type=\"text\" name=\"mass_flow_rate_value\" id=\"field-1\" aria-describedby=\"calc-unit-1 calc-info-1\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"1\"\/><div class=\"unit\" id=\"calc-unit-1\"><\/div><small id=\"calc-info-1\">Enter the mass flow rate value 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\/s\">Kilogram per second (kg\/s)<\/option><option value=\"g\/s\">Gram per second (g\/s)<\/option><option value=\"kg\/min\">Kilogram per minute (kg\/min)<\/option><option value=\"kg\/h\">Kilogram per hour (kg\/h)<\/option><option value=\"lb\/s\">Pound per second (lb\/s)<\/option><option value=\"lb\/min\">Pound per minute (lb\/min)<\/option><option value=\"lb\/h\">Pound per hour (lb\/h)<\/option><option value=\"ton\/h\">Tons per hour (metric ton\/h)<\/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\/s\">Kilogram per second (kg\/s)<\/option><option value=\"g\/s\">Gram per second (g\/s)<\/option><option value=\"kg\/min\">Kilogram per minute (kg\/min)<\/option><option value=\"kg\/h\">Kilogram per hour (kg\/h)<\/option><option value=\"lb\/s\">Pound per second (lb\/s)<\/option><option value=\"lb\/min\">Pound per minute (lb\/min)<\/option><option value=\"lb\/h\">Pound per hour (lb\/h)<\/option><option value=\"ton\/h\">Tons per hour (metric ton\/h)<\/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=\"55814\">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 Flow Rate<\/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=\"55814\" 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 Flow Rate 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\\[\\dot m_{\\mathrm{to}}=\\dot m_{\\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>\\(\\dot m_{\\mathrm{from}}\\) \u2014 numerical mass flow rate entered in the From unit<\/li>\n<li>\\(\\dot m_{\\mathrm{to}}\\) \u2014 numerical mass flow rate expressed in the To unit<\/li>\n<li>\\(f_{\\mathrm{from}}\\) \u2014 kilograms per second represented by one From unit<\/li>\n<li>\\(f_{\\mathrm{to}}\\) \u2014 kilograms per second represented by one To unit<\/li>\n<\/ul>\n<p>The converter first expresses the entered rate in kilograms per second, then divides by the factor for the selected output unit. The physical flow rate stays the same; only its numerical value and unit change.<\/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 Flow Rate \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> With the default settings, convert a mass flow rate of 1 kilogram per second to kilograms per hour.<\/p>\n<p>\\[1\\ \\mathrm{kg\/s}\\times\\frac{3{,}600\\ \\mathrm{s}}{1\\ \\mathrm{h}}=3{,}600\\ \\mathrm{kg\/h}\\]<\/p>\n<p><strong>Result:<\/strong> 1 kg\/s = 3,600 kg\/h.<\/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 flow rate value<\/strong>. For example, enter 1 to reproduce the calculation above.<\/li>\n<li>Choose the current unit from <strong>From unit<\/strong>. Select kg\/s for the example.<\/li>\n<li>Choose the desired unit from <strong>To unit<\/strong>. Select kg\/h for the example.<\/li>\n<li>Read <strong>Converted Mass Flow Rate<\/strong>. The result includes the selected output unit.<\/li>\n<\/ol>\n<p>You can select the same unit in both menus to leave the value unchanged. To reverse a conversion, swap the two unit selections and enter the converted value. The menus offer kilograms per second, minute, or hour; grams per second; pounds per second, minute, or hour; and metric tons per hour.<\/p>\n<h2>What mass flow rate means<\/h2>\n<p>Mass flow rate is the mass that passes a point or cross-section per unit of time. A rate of 1 kg\/s means that one kilogram passes that point each second. Unlike a total mass, a flow rate includes a time interval in its unit. It is used to describe streams of liquids, gases, and bulk materials in pipes, ventilation systems, and industrial processes.<\/p>\n<p>Converting units makes rates easier to compare. A short-duration process may be specified in kg\/s, while a daily operating report may use kg\/h or metric tons per hour. The example result, 3,600 kg\/h, does not describe more material flowing than 1 kg\/s: there are 3,600 seconds in an hour, so the two numbers describe the same rate.<\/p>\n<p>Mass flow rate differs from <a href=\"https:\/\/wpcalc.com\/en\/converters\/mass-flux-density\/\">mass flux density<\/a>, which expresses flow per unit area. A flow rate alone cannot tell you how much mass crosses each square meter of an opening; you also need the relevant cross-sectional area. It also differs from <a href=\"https:\/\/wpcalc.com\/en\/converters\/molar-flow-rate\/\">molar flow rate<\/a>, which counts moles per unit of time. Converting between mass and molar flow requires the substance\u2019s molar mass, not just a change of units.<\/p>\n<h2>Conversion factors and practical limits<\/h2>\n<p>The calculator uses kilograms per second as its intermediate unit. The following factors show the number of kg\/s in one unit of each supported rate:<\/p>\n<table>\n<thead>\n<tr>\n<th>Unit<\/th>\n<th>Equivalent in kg\/s<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1 kg\/s<\/td>\n<td>1<\/td>\n<\/tr>\n<tr>\n<td>1 g\/s<\/td>\n<td>0.001<\/td>\n<\/tr>\n<tr>\n<td>1 kg\/min<\/td>\n<td>1\/60<\/td>\n<\/tr>\n<tr>\n<td>1 kg\/h<\/td>\n<td>1\/3,600<\/td>\n<\/tr>\n<tr>\n<td>1 lb\/s<\/td>\n<td>0.45359237<\/td>\n<\/tr>\n<tr>\n<td>1 lb\/min<\/td>\n<td>0.45359237\/60<\/td>\n<\/tr>\n<tr>\n<td>1 lb\/h<\/td>\n<td>0.45359237\/3,600<\/td>\n<\/tr>\n<tr>\n<td>1 metric ton\/h<\/td>\n<td>1,000\/3,600<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Here, a pound is an avoirdupois pound, and a metric ton is 1,000 kg. \u201cTons per hour\u201d in this calculator does not mean US short tons or imperial long tons. Check the ton definition in your source data before entering a value.<\/p>\n<p>This is a unit converter, not a flow meter. It does not determine a flow rate from velocity, pipe dimensions, density, or <a href=\"https:\/\/wpcalc.com\/en\/converters\/pressure\/\">pressure<\/a>. Those quantities may be needed to establish the original rate, but they do not change a unit conversion once that rate is known. Results are rounded to 10 decimal places, so a very small nonzero rate may appear as zero when expressed in a much larger unit.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Convert a mass flow rate between kg\/s, g\/s, kg\/min, kg\/h, lb\/s, lb\/min, lb\/h, and metric tons per hour. Enter a value and 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-55814","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\/55814","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=55814"}],"version-history":[{"count":2,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55814\/revisions"}],"predecessor-version":[{"id":65293,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55814\/revisions\/65293"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=55814"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=55814"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=55814"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}