{"id":65417,"date":"2026-09-28T18:21:52","date_gmt":"2026-09-28T15:21:52","guid":{"rendered":"https:\/\/wpcalc.com\/en\/?p=65417"},"modified":"2026-09-29T15:19:16","modified_gmt":"2026-09-29T12:19:16","slug":"mpg-to-l-100km-fuel-economy-converter","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/converters\/mpg-to-l-100km-fuel-economy-converter\/","title":{"rendered":"MPG to L\/100km Fuel Economy 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 Fuel Economy Units<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"65417\" data-favorite-title=\"Fuel Economy Converter\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/converters\/mpg-to-l-100km-fuel-economy-converter\/\" data-favorite-excerpt=\"Convert fuel economy between MPG (US), MPG (UK), liters per 100 km and km\/L. Enter any value, choose its unit, and get all four equivalents at once.\" 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\/mpg-to-l-100km-fuel-economy-converter\/\" method=\"POST\" class=\"calculator\" id=\"calculator-65417\" data-post=\"65417\"><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\">Fuel economy value<\/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=\"fuel_economy_value\" id=\"field-1\" aria-describedby=\"calc-info-1\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" min=\"0\" value=\"25\"\/><small id=\"calc-info-1\">Enter the value you want to convert (must be greater than 0)<\/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=\"mpg_us\" selected>Miles per US gallon (MPG US)<\/option><option value=\"mpg_uk\">Miles per UK gallon (MPG UK)<\/option><option value=\"l100\">Liters per 100 km (L\/100km)<\/option><option value=\"kml\">Kilometers per liter (km\/L)<\/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=\"65417\">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> Equivalent Fuel Economy<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>Miles per US gallon<\/span><span class=\"result-term\">MPG<\/span><\/span><span class=\"field-value\" id=\"result-1\" data-unit=\"MPG (US)\"><\/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\" id=\"output-2\"><span class=\"field-title\"><span>Miles per UK gallon<\/span><span class=\"result-term\">MPG<\/span><\/span><span class=\"field-value\" id=\"result-2\" data-unit=\"MPG (UK)\"><\/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\" id=\"output-3\"><span class=\"field-title\"><span>Liters per 100 km<\/span><span class=\"result-term\">L\/100km<\/span><\/span><span class=\"field-value\" id=\"result-3\" data-unit=\"L\/100km\"><\/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\" id=\"output-4\"><span class=\"field-title\"><span>Kilometers per liter<\/span><span class=\"result-term\">km\/L<\/span><\/span><span class=\"field-value\" id=\"result-4\" data-unit=\"km\/L\"><\/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=\"65417\" 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>Fuel Economy Converter 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\\[\n\\text{L\/100 km} = \\frac{235.214583}{V_{\\text{MPG US}}} = \\frac{282.480936}{V_{\\text{MPG UK}}} = \\frac{100}{V_{\\text{km\/L}}} \\\\\n\\text{MPG US} = \\frac{235.214583}{V_{\\text{L\/100 km}}}, \\quad \\text{MPG UK} = \\frac{282.480936}{V_{\\text{L\/100 km}}}, \\quad \\text{km\/L} = \\frac{100}{V_{\\text{L\/100 km}}}\n\\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Where:<\/strong><\/p>\n<ul>\n<li>\\(V_{\\text{MPG US}}\\) \u2014 the value expressed in miles per US gallon<\/li>\n<li>\\(V_{\\text{MPG UK}}\\) \u2014 the value expressed in miles per UK (imperial) gallon<\/li>\n<li>\\(V_{\\text{km\/L}}\\) \u2014 the value expressed in kilometers per liter<\/li>\n<li>\\(V_{\\text{L\/100 km}}\\) \u2014 the value expressed in liters per 100 km<\/li>\n<\/ul>\n<p>The calculator converts every input first into L\/100km (the common base unit) and then derives the other three units from it. The constants follow from the exact definitions of the units: 1 US gallon = 3.785411784 L, 1 UK gallon = 4.54609 L, and 1 mile = 1.609344 km, so \\(235.214583 = 100 \\times 3.785411784 \/ 1.609344\\) and \\(282.480936 = 100 \\times 4.54609 \/ 1.609344\\).<\/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>Fuel Economy Converter \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> a car is rated at 25 miles per US gallon. Convert this rating into the other three units.<\/p>\n<p>\\[ \\text{L\/100 km} = \\frac{235.214583}{25} = 9.41 \\]<\/p>\n<p>\\[ \\text{km\/L} = \\frac{100}{9.4086} = 10.63 \\]<\/p>\n<p>\\[ \\text{MPG UK} = \\frac{282.480936}{9.4086} = 30.02 \\]<\/p>\n<p><strong>Result:<\/strong> 25 MPG (US) = 9.41 L\/100 km = 10.63 km\/L = 30.02 MPG (UK).<\/p>\n<p>\n\r\n<\/section>\n<h2>How to Use the Calculator<\/h2>\n<ol>\n<li>Type your number into the <strong>Fuel economy value<\/strong> field (it must be greater than 0).<\/li>\n<li>Select the unit this value is currently in from the <strong>From unit<\/strong> dropdown: Miles per US gallon (MPG US), Miles per UK gallon (MPG UK), Liters per 100 km (L\/100km), or Kilometers per liter (km\/L).<\/li>\n<li>Read the results under <strong>Equivalent Fuel Economy<\/strong>: the same fuel economy shown in all four units, rounded to two decimals.<\/li>\n<li>Change the value or the unit at any time \u2014 all four results update instantly.<\/li>\n<\/ol>\n<h2>What These Fuel Economy Units Mean<\/h2>\n<p>Fuel economy is expressed in two opposite ways. Miles per gallon (MPG) and kilometers per liter (km\/L) are <em>distance per fuel<\/em> units: how far you can drive on one gallon or one liter. Higher values mean better efficiency. Liters per 100 km (L\/100km) is a <em>fuel per distance<\/em> unit: how much fuel you burn to cover 100 km. Here, lower values mean better efficiency. Because the two families run in opposite directions, you cannot compare them by eye \u2014 a car that uses half the fuel doubles its MPG but halves its L\/100km.<\/p>\n<p>The US and UK gallons are different volumes: the imperial gallon is 4.54609 L while the US gallon is only 3.785411784 L \u2014 about 20% smaller. This is why the same real-world efficiency gives noticeably different numbers: 25 MPG (US) equals 30.02 MPG (UK). Confusing the two gallons is one of the most common mistakes when comparing vehicles advertised in different countries, which is why this calculator keeps them separate.<\/p>\n<p>The L\/100km scale has a practical advantage: fuel consumed \u2014 and therefore fuel cost \u2014 is directly proportional to it. A car at 9 L\/100km uses exactly three times as much fuel over a given distance as one at 3 L\/100km. On the MPG scale the same comparison requires division, because the relationship is inverse.<\/p>\n<h2>Quick Reference Table<\/h2>\n<table>\n<thead>\n<tr>\n<th>MPG (US)<\/th>\n<th>L\/100 km<\/th>\n<th>km\/L<\/th>\n<th>MPG (UK)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>10<\/td>\n<td>23.52<\/td>\n<td>4.25<\/td>\n<td>12.00<\/td>\n<\/tr>\n<tr>\n<td>20<\/td>\n<td>11.76<\/td>\n<td>8.50<\/td>\n<td>24.02<\/td>\n<\/tr>\n<tr>\n<td>25<\/td>\n<td>9.41<\/td>\n<td>10.63<\/td>\n<td>30.02<\/td>\n<\/tr>\n<tr>\n<td>30<\/td>\n<td>7.84<\/td>\n<td>12.75<\/td>\n<td>36.03<\/td>\n<\/tr>\n<tr>\n<td>40<\/td>\n<td>5.88<\/td>\n<td>17.00<\/td>\n<td>48.04<\/td>\n<\/tr>\n<tr>\n<td>50<\/td>\n<td>4.70<\/td>\n<td>21.26<\/td>\n<td>60.05<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Assumptions, Limitations and Tips<\/h2>\n<ul>\n<li>The calculator uses exact legal definitions of the units (1 mile = 1.609344 km, 1 US gal = 3.785411784 L, 1 UK gal = 4.54609 L), so results are accurate to the precision shown.<\/li>\n<li>The input value must be greater than 0. A rating of 0 MPG or 0 km\/L would correspond to infinite consumption and cannot be converted.<\/li>\n<li>Official fuel economy ratings (city, highway, combined) are measured under standardized test conditions; your real-world consumption will usually be somewhat higher. Convert the rating you actually want to compare, not a rough guess.<\/li>\n<li>When comparing cars from different markets, always check which gallon the figure uses. Advertised \"MPG\" in the United States is MPG US; in the United Kingdom and Canada it is MPG UK.<\/li>\n<li>If you are planning a trip, remember that fuel cost scales linearly with L\/100km: multiply the L\/100km figure by the distance in hundreds of km and by the price per liter.<\/li>\n<\/ul>\n<p>For related conversions while comparing vehicles or planning a drive, you may also find the <a href=\"https:\/\/wpcalc.com\/en\/converters\/speed-units-converter\/\">Speed Converter<\/a> useful for switching between km\/h and mph, and the <a href=\"https:\/\/wpcalc.com\/en\/converters\/volume-table\/\">Volume Table<\/a> for converting between gallons, liters and other volume units. If you need to convert distances themselves, try the <a href=\"https:\/\/wpcalc.com\/en\/converters\/meters-to-feet\/\">Meters to Feet<\/a> converter.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Convert fuel economy between MPG (US), MPG (UK), liters per 100 km and km\/L. Enter any value, choose its unit, and get all four equivalents at once.<\/p>\n","protected":false},"author":3168,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3],"tags":[31],"class_list":["post-65417","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\/65417","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\/3168"}],"replies":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/comments?post=65417"}],"version-history":[{"count":3,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/65417\/revisions"}],"predecessor-version":[{"id":65702,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/65417\/revisions\/65702"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=65417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=65417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=65417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}