{"id":55930,"date":"2015-10-24T15:53:53","date_gmt":"2015-10-24T13:53:53","guid":{"rendered":"http:\/\/wpcalc.com\/?p=55930"},"modified":"2026-10-23T10:00:21","modified_gmt":"2026-10-23T07:00:21","slug":"water-weight","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/converters\/water-weight\/","title":{"rendered":"How Much Does a Gallon of Water Weigh? \u2013 Water Weight Calculator"},"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 Water Volume to Weight<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"55930\" data-favorite-title=\"Water Weight\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/converters\/water-weight\/\" data-favorite-excerpt=\"Convert a quantity of water between volume and mass units. Enter a value, then choose the From and To units to see the equivalent at an assumed density of 1 kg\/L.\" aria-label=\"Add to Favorites\" data-favorite-icon=\"icon icon-units\">\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\/water-weight\/\" method=\"POST\" class=\"calculator\" id=\"calculator-55930\" data-post=\"55930\"><fieldset class=\"fieldset-input\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"field is-single has-term\" id=\"input-1\"><label for=\"field-1\">Quantity to Convert<\/label><div class=\"term\">V<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><input type=\"text\" name=\"quantity_to_convert\" id=\"field-1\" aria-describedby=\"calc-info-1\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"1\"\/><small id=\"calc-info-1\">Any volume or weight of water, in any unit below \u2014 the converter works in both directions<\/small><\/div><div class=\"field\" id=\"input-2\"><label for=\"field-2\">From<\/label><div class=\"grid grid-cols-1\"><select id=\"field-2\" name=\"from\"><option value=\"cm3\">Cubic Centimeters (cm\u00b3)<\/option><option value=\"ml\">Milliliters (mL)<\/option><option value=\"liter\" selected>Liters (L)<\/option><option value=\"floz_us\">Fluid Ounces (US)<\/option><option value=\"cup_us\">Cups (US)<\/option><option value=\"gallon_us\">Gallons (US)<\/option><option value=\"gallon_uk\">Gallons (imperial)<\/option><option value=\"inch3\">Cubic Inches (in\u00b3)<\/option><option value=\"ft3\">Cubic Feet (ft\u00b3)<\/option><option value=\"m3\">Cubic Meters (m\u00b3)<\/option><option value=\"gram\">Grams (g)<\/option><option value=\"kg\">Kilograms (kg)<\/option><option value=\"lb\">Pounds (lb)<\/option><option value=\"oz\">Ounces (oz)<\/option><option value=\"ton\">Metric Tonnes (t)<\/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<\/label><div class=\"grid grid-cols-1\"><select id=\"field-3\" name=\"to\"><option value=\"cm3\">Cubic Centimeters (cm3)<\/option><option value=\"ml\">Milliliters (mL)<\/option><option value=\"liter\">Liters (L)<\/option><option value=\"floz_us\">Fluid Ounces (US)<\/option><option value=\"cup_us\">Cups (US)<\/option><option value=\"gallon_us\">Gallons (US)<\/option><option value=\"gallon_uk\">Gallons (imperial)<\/option><option value=\"inch3\">Cubic Inches (in\u00b3)<\/option><option value=\"ft3\">Cubic Feet (ft\u00b3)<\/option><option value=\"m3\">Cubic Meters (m\u00b3)<\/option><option value=\"gram\">Grams (g)<\/option><option value=\"kg\" selected>Kilograms (kg)<\/option><option value=\"lb\">Pounds (lb)<\/option><option value=\"oz\">Ounces (oz)<\/option><option value=\"ton\">Metric Tonnes (t)<\/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 has-term\" id=\"input-4\"><label for=\"field-4\">Water Temperature<\/label><div class=\"term\">T<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><div class=\"field-group\"><input type=\"text\" name=\"water_temperature\" id=\"field-4\" aria-describedby=\"calc-info-4\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" max=\"212\" value=\"20\"\/><div class=\"grid grid-cols-1\"><select id=\"field-5\" name=\"unit\" aria-label=\"Unit\"><option value=\"c\" selected>\u00b0C<\/option><option value=\"f\">\u00b0F<\/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><small id=\"calc-info-4\">Warmer water is slightly lighter; liquid range 0\u2013100 \u00b0C (32\u2013212 \u00b0F)<\/small><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Re-Calculate\" id=\"calculate-button\" data-post=\"55930\">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 Water Weight Results<\/h3><div class=\"result-box\"><div class=\"field-result is-column\" id=\"output-1\"><span class=\"field-title\"><span>Direct Answer<\/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 class=\"field-result is-column\" id=\"output-2\"><span class=\"field-title\"><span>Your Conversion<\/span><\/span><span class=\"field-value\" id=\"result-2\"><\/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 class=\"field-result is-column\" id=\"output-3\"><span class=\"field-title\"><span>Effect of Temperature<\/span><\/span><span class=\"field-value\" id=\"result-3\"><\/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 class=\"field-result is-column\" id=\"output-4\"><span class=\"field-title\"><span>Weight of 1\u201355 Gallons (US &amp; Imperial)<\/span><\/span><span class=\"field-value\" id=\"result-4\"><\/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=\"55930\" 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\">1<\/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>Water Weight 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\\[m=\\rho V,\\qquad \\rho=1\\,\\mathrm{kg\/L}\\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Where:<\/strong><\/p>\n<ul>\n<li>\\(m\\) \u2014 mass of the water (kg)<\/li>\n<li>\\(V\\) \u2014 volume of the water (L)<\/li>\n<li>\\(\\rho\\) \u2014 assumed water density (1 kg\/L)<\/li>\n<\/ul>\n<p>At the density used by this converter, one liter of water has a mass of one kilogram. To convert mass back to volume, use \\(V=m\/\\rho\\); the selected units are then converted to or from liters and kilograms.<\/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>Water Weight \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> Convert 1 liter of water to kilograms using the calculator\u2019s default values.<\/p>\n<p>\\[m=\\rho V=(1\\,\\mathrm{kg\/L})(1\\,\\mathrm{L})=1\\,\\mathrm{kg}\\]<\/p>\n<p><strong>Result:<\/strong> 1 liter of water has a mass of 1 kilogram under the calculator\u2019s density assumption.<\/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>Quantity to Convert<\/strong>. The default is 1.<\/li>\n<li>Choose the unit of that number in <strong>From<\/strong>. You can select a volume unit, such as liters or US gallons, or a mass unit, such as grams or pounds.<\/li>\n<li>Choose the unit you want in <strong>To<\/strong>. Select either a volume or mass unit.<\/li>\n<li>Read the <strong>Converted Value<\/strong>. The calculator displays the result in your selected unit, rounded to four decimal places.<\/li>\n<\/ol>\n<p>For example, keep <strong>Quantity to Convert<\/strong> at 1 and <strong>From<\/strong> at Liters (L), then change <strong>To<\/strong> to Pounds (lb) to estimate the mass of one liter of water in pounds. To work in the other direction, select Pounds (lb) under <strong>From<\/strong> and Liters (L) under <strong>To<\/strong>.<\/p>\n<h2>What water weight conversion means<\/h2>\n<p>Volume describes how much space water occupies; mass describes how much matter it contains. Density connects the two. This calculator assumes a density of 1 gram per cubic centimeter, equivalent to 1 kilogram per liter. That is a close approximation for pure water near 4\u00b0C (39\u00b0F), the temperature at which its density is greatest.<\/p>\n<p>In everyday language, people often call a water mass its \u201cweight.\u201d The calculator follows that usage when converting to grams, kilograms, or pounds. Strictly speaking, weight is a force that depends on gravity, whereas mass does not. The result is a mass equivalent, not a force in newtons.<\/p>\n<p>You can use the converter in either direction: enter a known volume to estimate water mass, or enter a known mass to estimate volume. It also converts between supported units of the same kind. For instance, selecting Grams (g) and Pounds (lb) converts mass units, while selecting Cubic Feet (ft\u00b3) and Liters (L) converts volume units. For general mass conversions that do not rely on water density, use the <a href=\"https:\/\/wpcalc.com\/en\/converters\/weight-and-mass\/\">weight and mass converter<\/a>.<\/p>\n<h2>Common water volume and mass equivalents<\/h2>\n<p>The following values use the calculator\u2019s assumed density. They are useful for checking an estimate before working with a larger quantity. US and UK gallons are different sizes, so check which gallon unit you select.<\/p>\n<table>\n<thead>\n<tr>\n<th>Water volume<\/th>\n<th>Equivalent mass<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1 cubic centimeter (cm\u00b3)<\/td>\n<td>1 gram (g)<\/td>\n<\/tr>\n<tr>\n<td>1 liter (L)<\/td>\n<td>1 kilogram (kg)<\/td>\n<\/tr>\n<tr>\n<td>1 US gallon<\/td>\n<td>3.78541 kilograms<\/td>\n<\/tr>\n<tr>\n<td>1 UK gallon<\/td>\n<td>4.54609 kilograms<\/td>\n<\/tr>\n<tr>\n<td>1 cubic foot (ft\u00b3)<\/td>\n<td>28.3168 kilograms<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>For other volume-to-volume comparisons, see the <a href=\"https:\/\/wpcalc.com\/en\/converters\/volume-table\/\">volume conversion table<\/a>.<\/p>\n<h2>Assumptions and practical limits<\/h2>\n<p>The calculator uses a fixed density; it has no temperature, pressure, or salinity input. At about 20\u00b0C (68\u00b0F), pure water is slightly less dense\u2014approximately 0.9982 kg\/L\u2014so a liter has a mass of about 0.9982 kg rather than exactly 1 kg. Dissolved substances, including salt, can also change density. Use a density appropriate to your conditions if that difference matters for laboratory, shipping, or engineering work.<\/p>\n<p>The unit conversions use fixed factors, and the displayed answer is rounded to four decimal places. Very small nonzero quantities may therefore display as zero. If you need a more precise result, retain additional digits during your own calculation and round only at the end.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Convert a quantity of water between volume and mass units. Enter a value, then choose the From and To units to see the equivalent at an assumed density of 1 kg\/L.<\/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":[13],"class_list":["post-55930","post","type-post","status-publish","format-standard","hentry","category-converters","tag-basic-units"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55930","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=55930"}],"version-history":[{"count":5,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55930\/revisions"}],"predecessor-version":[{"id":67450,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55930\/revisions\/67450"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=55930"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=55930"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=55930"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}