{"id":55888,"date":"2015-10-24T15:55:02","date_gmt":"2015-10-24T13:55:02","guid":{"rendered":"http:\/\/wpcalc.com\/?p=55888"},"modified":"2026-09-28T09:33:17","modified_gmt":"2026-09-28T06:33:17","slug":"radiation-absorbed-dose","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/converters\/radiation-absorbed-dose\/","title":{"rendered":"Radiation Absorbed Dose 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 Absorbed Radiation Dose Between Units<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"55888\" data-favorite-title=\"Radiation Absorbed Dose\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/converters\/radiation-absorbed-dose\/\" data-favorite-excerpt=\"Convert an absorbed radiation dose between grays, milligrays, micrograys, rads, and millirads. 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\/radiation-absorbed-dose\/\" method=\"POST\" class=\"calculator\" id=\"calculator-55888\" data-post=\"55888\"><fieldset class=\"fieldset-input\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"field is-single\" id=\"input-1\"><label for=\"field-1\">Absorbed dose value<\/label><input type=\"text\" name=\"absorbed_dose_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 absorbed dose 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=\"Gy\">Gray (Gy)<\/option><option value=\"mGy\">Milligray (mGy)<\/option><option value=\"\u00b5Gy\">Microgray (\u00b5Gy)<\/option><option value=\"rad\">Rad<\/option><option value=\"mrad\">Millirad<\/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=\"Gy\">Gray (Gy)<\/option><option value=\"mGy\">Milligray (mGy)<\/option><option value=\"\u00b5Gy\">Microgray (\u00b5Gy)<\/option><option value=\"rad\">Rad<\/option><option value=\"mrad\">Millirad<\/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=\"55888\">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 Absorbed Dose<\/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=\"55888\" 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\">1<\/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>Radiation Absorbed Dose 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\\[D_{\\mathrm{to}}=D_{\\mathrm{from}}\\times\\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>\\(D_{\\mathrm{from}}\\) \u2014 the entered absorbed dose in the selected starting unit<\/li>\n<li>\\(D_{\\mathrm{to}}\\) \u2014 the converted absorbed dose in the selected target unit<\/li>\n<li>\\(f_{\\mathrm{from}}\\) and \\(f_{\\mathrm{to}}\\) \u2014 factors that convert each selected unit to grays (Gy)<\/li>\n<\/ul>\n<p>The calculator first converts the entered value to grays, then divides by the factor for the target unit. The factors are 1 for Gy, 0.001 for mGy, 0.000001 for \u00b5Gy, 0.01 for rad, and 0.00001 for mrad.<\/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>Radiation Absorbed Dose \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> with the default settings, convert an absorbed dose of 1 gray to rads.<\/p>\n<p>\\[D_{\\mathrm{rad}}=1\\,\\mathrm{Gy}\\times\\frac{1}{0.01}=100\\,\\mathrm{rad}\\]<\/p>\n<p><strong>Result:<\/strong> 1 Gy = 100 rad.<\/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>Absorbed dose value<\/strong>. Use the value as stated in your measurement or source document.<\/li>\n<li>Choose its current unit under <strong>From unit<\/strong>: Gray (Gy), Milligray (mGy), Microgray (\u00b5Gy), Rad, or Millirad.<\/li>\n<li>Choose the unit you need under <strong>To unit<\/strong>. The <strong>Converted Absorbed Dose<\/strong> result displays the converted number and its unit.<\/li>\n<\/ol>\n<p>You can select the same unit in both menus to leave the numerical value unchanged. Check both selections before copying a result: a milligray and a microgray differ by a factor of 1,000.<\/p>\n<h2>What absorbed dose means<\/h2>\n<p>Absorbed dose is the energy deposited by ionizing radiation per unit mass of material. Its SI unit, the gray, is defined as one joule of deposited energy per kilogram: \\(1\\,\\mathrm{Gy}=1\\,\\mathrm{J\/kg}\\). The rad is an older unit of the same quantity. Converting between grays and rads changes how a dose is expressed, not the physical dose itself.<\/p>\n<p>Absorbed dose is used to describe energy deposited in tissue or other materials, including in radiation therapy, radiation biology, and radiation protection. Its meaning depends on what material or tissue received the dose and where the dose was measured. A converted number does not supply that context.<\/p>\n<p>Absorbed dose is not the same as equivalent or effective dose, which are expressed in sieverts and account for additional radiation-protection factors. Do not convert Gy directly to Sv using this tool: the numerical relationship depends on the radiation type and, for effective dose, the tissues involved. Absorbed dose also differs from the frequency of electromagnetic radiation; a <a href=\"https:\/\/wpcalc.com\/en\/converters\/frequency\/\">frequency converter<\/a> changes units of oscillation, not units of deposited energy per mass.<\/p>\n<h2>Unit relationships and practical limits<\/h2>\n<table>\n<thead>\n<tr>\n<th>Unit<\/th>\n<th>Equivalent in grays<\/th>\n<th>Useful relationship<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Gray (Gy)<\/td>\n<td>1 Gy<\/td>\n<td>1 Gy = 1 J\/kg = 100 rad<\/td>\n<\/tr>\n<tr>\n<td>Milligray (mGy)<\/td>\n<td>0.001 Gy<\/td>\n<td>1 mGy = 1,000 \u00b5Gy<\/td>\n<\/tr>\n<tr>\n<td>Microgray (\u00b5Gy)<\/td>\n<td>0.000001 Gy<\/td>\n<td>1 \u00b5Gy = 0.1 mrad<\/td>\n<\/tr>\n<tr>\n<td>Rad<\/td>\n<td>0.01 Gy<\/td>\n<td>1 rad = 10 mGy<\/td>\n<\/tr>\n<tr>\n<td>Millirad (mrad)<\/td>\n<td>0.00001 Gy<\/td>\n<td>1 mrad = 10 \u00b5Gy<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Joules per kilogram defines the gray, but J\/kg is not a selectable unit in this calculator. If a source gives absorbed dose in J\/kg, its numerical value is the same in Gy. The calculator accepts nonnegative values; a negative absorbed dose is not a meaningful input here.<\/p>\n<p>The result is a unit conversion, not a measurement or an assessment of risk. It cannot determine how a dose was distributed through an object, which radiation produced it, or whether a reported value is appropriate for a particular application. Keep the significant figures justified by your original data; conversion does not make a measurement more precise. Very small converted values may display as zero because the calculator rounds its output.<\/p>\n<p>Do not confuse absorbed dose with a rate or a flux. Dose rate needs a time unit, such as Gy per hour, while <a href=\"https:\/\/wpcalc.com\/en\/converters\/heat-flux-density\/\">heat flux density<\/a> describes energy transfer per area per time. Neither is directly interchangeable with an absorbed dose in Gy without additional information.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Convert an absorbed radiation dose between grays, milligrays, micrograys, rads, and millirads. 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-55888","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\/55888","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=55888"}],"version-history":[{"count":2,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55888\/revisions"}],"predecessor-version":[{"id":65304,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/55888\/revisions\/65304"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=55888"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=55888"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=55888"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}