{"id":55926,"date":"2015-10-24T15:52:57","date_gmt":"2015-10-24T13:52:57","guid":{"rendered":"http:\/\/wpcalc.com\/?p=55926"},"modified":"2026-09-28T09:14:42","modified_gmt":"2026-09-28T06:14:42","slug":"delisle","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/converters\/delisle\/","title":{"rendered":"Delisle to Celsius, Fahrenheit, Kelvin &#038; More 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\">Delisle Temperature Conversion Tool<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"55926\" data-favorite-title=\"Delisle to Celsius, Fahrenheit, Kelvin &amp; More\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/converters\/delisle\/\" data-favorite-excerpt=\"Enter a temperature in degrees Delisle to convert it to Celsius, Fahrenheit, Kelvin, Rankine, Newton, R\u00e9aumur, and R\u00f8mer.\" aria-label=\"Add to Favorites\" data-favorite-icon=\"icon icon-chemistry\">\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\/delisle\/\" method=\"POST\" class=\"calculator\" id=\"calculator-55926\" data-post=\"55926\"><fieldset class=\"fieldset-input is-1\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"field has-term\" id=\"input-1\"><label for=\"field-1\">Temperature in Delisle<\/label><div class=\"term\">\u00b0De<\/div>  <div class=\"absolute bottom-0 left-16 top-8 w-2 h-0.5 bg-blue-500\"><\/div><input type=\"number\" name=\"temperature_in_delisle\" id=\"field-1\" aria-describedby=\"calc-unit-1 calc-info-1\" step=\"0.1\" value=\"60\"\/><div class=\"unit\" id=\"calc-unit-1\">\u00b0De<\/div><small id=\"calc-info-1\">Enter the temperature in degrees Delisle<\/small><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Re-Calculate\" id=\"calculate-button\" data-post=\"55926\">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>Celsius<\/span><\/span><span class=\"field-value\" id=\"result-1\" data-unit=\"\u00b0C\"><\/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>Fahrenheit<\/span><\/span><span class=\"field-value\" id=\"result-2\" data-unit=\"\u00b0F\"><\/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>Kelvin<\/span><\/span><span class=\"field-value\" id=\"result-3\" data-unit=\"K\"><\/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>Rankine<\/span><\/span><span class=\"field-value\" id=\"result-4\" data-unit=\"\u00b0R\"><\/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-5\"><span class=\"field-title\"><span>Newton<\/span><\/span><span class=\"field-value\" id=\"result-5\" data-unit=\"\u00b0N\"><\/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-6\"><span class=\"field-title\"><span>Reaumur<\/span><\/span><span class=\"field-value\" id=\"result-6\" data-unit=\"\u00b0Re\"><\/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-7\"><span class=\"field-title\"><span>R\u00f8mer<\/span><\/span><span class=\"field-value\" id=\"result-7\" data-unit=\"\u00b0R\u00f8\"><\/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=\"55926\" 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>Delisle Temperature Conversion 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\\begin{aligned}\nC &amp;= 100-\\frac{2}{3}D \\\\\nF &amp;= \\frac{9}{5}C+32 \\\\\nK &amp;= C+273.15 \\\\\nR &amp;= \\frac{9}{5}C+491.67 \\\\\nN &amp;= \\frac{33}{100}C \\\\\nRe &amp;= \\frac{4}{5}C \\\\\nRo &amp;= \\frac{21}{40}C+7.5\n\\end{aligned}\n\\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Where:<\/strong><\/p>\n<ul>\n<li>\\(D\\) \u2014 temperature in degrees Delisle (\u00b0De)<\/li>\n<li>\\(C\\) \u2014 temperature in degrees Celsius (\u00b0C)<\/li>\n<li>\\(F\\) \u2014 temperature in degrees Fahrenheit (\u00b0F)<\/li>\n<li>\\(K\\) \u2014 temperature in kelvins (K)<\/li>\n<li>\\(R\\) \u2014 temperature in degrees Rankine (\u00b0R)<\/li>\n<li>\\(N\\) \u2014 temperature in degrees Newton (\u00b0N)<\/li>\n<li>\\(Re\\) \u2014 temperature in degrees R\u00e9aumur (\u00b0Re)<\/li>\n<li>\\(Ro\\) \u2014 temperature in degrees R\u00f8mer (\u00b0R\u00f8)<\/li>\n<\/ul>\n<p>First convert Delisle to Celsius, then use the Celsius value for each other scale. The Delisle scale runs in the opposite direction from Celsius: a larger Delisle reading represents a lower temperature.<\/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>Delisle Temperature Conversion \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> Convert the default input of 60 \u00b0De to all seven output units.<\/p>\n<p>\\[\\begin{aligned}C&amp;=100-\\frac{2}{3}(60)=60\\,^{\\circ}\\mathrm{C} \\\\ F&amp;=\\frac95(60)+32=140\\,^{\\circ}\\mathrm{F} \\\\ K&amp;=60+273.15=333.15\\,\\mathrm{K} \\\\ R&amp;=\\frac95(60)+491.67=599.67\\,^{\\circ}\\mathrm{R} \\\\ N&amp;=\\frac{33}{100}(60)=19.8\\,^{\\circ}\\mathrm{N} \\\\ Re&amp;=\\frac45(60)=48\\,^{\\circ}\\mathrm{Re} \\\\ Ro&amp;=\\frac{21}{40}(60)+7.5=39\\,^{\\circ}\\mathrm{R\\o} \\end{aligned}\\]<\/p>\n<p><strong>Result:<\/strong> 60 \u00b0De equals 60 \u00b0C, 140 \u00b0F, 333.15 K, 599.67 \u00b0R, 19.8 \u00b0N, 48 \u00b0Re, and 39 \u00b0R\u00f8.<\/p>\n<p>\n\r\n<\/section>\n<h2>How to use the calculator<\/h2>\n<ol>\n<li>Find the field labeled <strong>Temperature in Delisle<\/strong>.<\/li>\n<li>Enter your reading in degrees Delisle (\u00b0De). The default value is 60, which you can leave in place to check the worked example.<\/li>\n<li>Read the results labeled <strong>Celsius<\/strong>, <strong>Fahrenheit<\/strong>, <strong>Kelvin<\/strong>, <strong>Rankine<\/strong>, <strong>Newton<\/strong>, <strong>Reaumur<\/strong>, and <strong>R\u00f8mer<\/strong>. Each result is the same temperature expressed on a different scale.<\/li>\n<li>Replace the input whenever you need to convert another reading. A decimal input can be useful when transcribing a measurement recorded to a fraction of a degree.<\/li>\n<\/ol>\n<h2>Understanding Delisle temperature<\/h2>\n<p>The Delisle scale is a historical temperature scale that you may encounter in older records. At standard atmospheric pressure, water boils at 0 \u00b0De and freezes at 150 \u00b0De. This ordering is easy to misread if you are accustomed to Celsius or Fahrenheit: on the Delisle scale, temperatures rise as the numbers fall. For example, 60 \u00b0De is warmer than 150 \u00b0De.<\/p>\n<p>The conversion starts with Celsius because the other six results can all be calculated from it. A change of 1 \u00b0De corresponds to a change of two-thirds of a Celsius degree in the opposite direction. Thus, moving from 60 \u00b0De to 61 \u00b0De lowers the equivalent Celsius temperature from 60 \u00b0C to about 59.33 \u00b0C. If you are comparing readings from several sources, converting them to one common scale helps prevent a reversed Delisle reading from being mistaken for a warming trend.<\/p>\n<p>Each output serves a different context. Celsius and Fahrenheit are common in everyday temperature reporting; kelvin is widely used in scientific calculations. Rankine is an absolute scale with Fahrenheit-sized increments, while Newton, R\u00e9aumur, and R\u00f8mer are historical scales. If your next value is already in another unit, use the <a href=\"https:\/\/wpcalc.com\/en\/converters\/celsius\/\">Celsius converter<\/a>, <a href=\"https:\/\/wpcalc.com\/en\/converters\/fahrenheit\/\">Fahrenheit converter<\/a>, or <a href=\"https:\/\/wpcalc.com\/en\/converters\/kelvin\/\">Kelvin converter<\/a> instead.<\/p>\n<h2>Reference points and practical limits<\/h2>\n<table>\n<thead>\n<tr>\n<th>Reference point<\/th>\n<th>Delisle<\/th>\n<th>Celsius<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Water boiling at standard atmospheric pressure<\/td>\n<td>0 \u00b0De<\/td>\n<td>100 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Worked example<\/td>\n<td>60 \u00b0De<\/td>\n<td>60 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Water freezing at standard atmospheric pressure<\/td>\n<td>150 \u00b0De<\/td>\n<td>0 \u00b0C<\/td>\n<\/tr>\n<tr>\n<td>Absolute zero<\/td>\n<td>559.725 \u00b0De<\/td>\n<td>\u2212273.15 \u00b0C<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>These are conversions between temperature readings, not instructions for measuring them. The water freezing and boiling reference points assume standard atmospheric pressure; the boiling temperature changes with pressure. A Delisle value below zero is mathematically valid and represents a temperature above 100 \u00b0C. Likewise, a value above 150 \u00b0De represents a temperature below 0 \u00b0C.<\/p>\n<p>For ordinary thermodynamic temperatures, 559.725 \u00b0De corresponds to absolute zero. A larger Delisle input produces a negative kelvin result, so check the source reading and its unit if that occurs. Also distinguish <strong>\u00b0R<\/strong> for Rankine from <strong>\u00b0R\u00f8<\/strong> for R\u00f8mer: their names and symbols are similar, but their numerical results are not interchangeable.<\/p>\n<p>The displayed results may be rounded. When checking a historical measurement, retain the precision justified by the original record rather than treating extra decimal places in a converted value as newly measured detail. If a source lists a different temperature unit, confirm the unit before entering its number as Delisle.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Enter a temperature in degrees Delisle to convert it to Celsius, Fahrenheit, Kelvin, Rankine, Newton, R\u00e9aumur, and R\u00f8mer.<\/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":[17],"class_list":["post-55926","post","type-post","status-publish","format-standard","hentry","category-converters","tag-chemistry-units"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55926","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=55926"}],"version-history":[{"count":2,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55926\/revisions"}],"predecessor-version":[{"id":65258,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55926\/revisions\/65258"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=55926"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=55926"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=55926"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}