{"id":66953,"date":"2026-10-13T10:39:19","date_gmt":"2026-10-13T07:39:19","guid":{"rendered":"https:\/\/wpcalc.com\/en\/?p=66953"},"modified":"2026-10-13T10:39:19","modified_gmt":"2026-10-13T07:39:19","slug":"wiens-displacement-law-calculator","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/physics\/wiens-displacement-law-calculator\/","title":{"rendered":"Wien's Displacement Law 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\">Find the Peak Wavelength or Temperature of a Hot Object<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"66953\" data-favorite-title=\"Wien&#039;s Displacement Law\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/physics\/wiens-displacement-law-calculator\/\" data-favorite-excerpt=\"Enter a blackbody&#039;s temperature to find the wavelength where it emits the most radiation (or enter a peak wavelength to find the temperature). Results include unit conversions, the spectral band, and the peak frequency.\" aria-label=\"Add to Favorites\" data-favorite-icon=\"icon icon-spectrum\">\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\/physics\/wiens-displacement-law-calculator\/\" method=\"POST\" class=\"calculator\" id=\"calculator-66953\" data-post=\"66953\"><fieldset class=\"fieldset-input is-1\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"field\" id=\"input-1\"><label for=\"field-1\">I want to find<\/label><div class=\"grid grid-cols-1\"><select id=\"field-1\" name=\"i_want_to_find\"><option value=\"wl\" selected>Peak wavelength (from temperature)<\/option><option value=\"temp\">Temperature (from peak wavelength)<\/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-2\"><label for=\"field-2\">Blackbody temperature (T)<\/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=\"blackbody_temperature_t\" id=\"field-2\" aria-describedby=\"calc-info-2\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"e.g. 5800\" min=\"0\" value=\"5800\"\/><div class=\"grid grid-cols-1\"><select id=\"field-3\" name=\"unit\" aria-label=\"Unit\"><option value=\"k\" selected>K<\/option><option value=\"c\">\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-2\">Surface temperature of the object. The Sun \u2248 5800 K, incandescent filament \u2248 2800 K, human body \u2248 310 K.<\/small><\/div><div class=\"field has-term\" id=\"input-3\" hidden><label for=\"field-4\">Peak wavelength (\u03bbmax)<\/label><div class=\"term\">\u03bbmax<\/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=\"peak_wavelength_max\" id=\"field-4\" aria-describedby=\"calc-info-4\" data-number inputmode=\"decimal\" autocomplete=\"off\" spellcheck=\"false\" placeholder=\"e.g. 1000\" min=\"0\" value=\"1000\"\/><div class=\"grid grid-cols-1\"><select id=\"field-5\" name=\"unit\" aria-label=\"Unit\"><option value=\"nm\" selected>nm<\/option><option value=\"um\">\u00b5m<\/option><option value=\"mm\">mm<\/option><option value=\"m\">m<\/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\">Wavelength at which the object emits the most radiation. Visible light spans roughly 380\u2013750 nm.<\/small><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Re-Calculate\" id=\"calculate-button\" data-post=\"66953\">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> Wien&#039;s Law Results<\/h3><div class=\"result-box\"><div class=\"field-result is-column\" id=\"output-1\"><span class=\"field-title\"><span>Peak emission wavelength (\u03bbmax)<\/span><span class=\"result-term\">\u03bbmax<\/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>Details \u2014 conversions, Wien&#039;s constant and spectral band<\/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><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=\"66953\" 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>Wien's Displacement Law 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\\[ \\lambda_{\\max} = \\frac{b}{T} \\quad \\text{where} \\quad b = 2.897771955 \\times 10^{-3}\\ \\text{m\u00b7K} \\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Where:<\/strong><\/p>\n<ul>\n<li>\\(\\lambda_{\\max}\\) \u2014 peak emission wavelength, the wavelength at which the object radiates the most power per unit wavelength (m)<\/li>\n<li>\\(T\\) \u2014 absolute temperature of the object (K)<\/li>\n<li>\\(b\\) \u2014 Wien's displacement constant, \\(b = 2.897771955 \\times 10^{-3}\\) m\u00b7K (CODATA 2018 value)<\/li>\n<\/ul>\n<p>The formula expresses Wien's displacement law: the hotter an object, the shorter the wavelength at which it shines most brightly. The product \\(\\lambda_{\\max} \\times T\\) is the same constant for every blackbody, so doubling the temperature halves the peak wavelength.<\/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>Wien's Displacement Law \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> the Sun's surface behaves roughly like a blackbody at 5800 K. At what wavelength does it emit most of its radiation?<\/p>\n<p>\\[ \\lambda_{\\max} = \\frac{b}{T} = \\frac{2.897771955 \\times 10^{-3}\\ \\text{m\u00b7K}}{5800\\ \\text{K}} = 4.9962 \\times 10^{-7}\\ \\text{m} \\]<\/p>\n<p>\\[ \\lambda_{\\max} = 499.62\\ \\text{nm} \\approx 0.4996\\ \\mu\\text{m} \\]<\/p>\n<p><strong>Result:<\/strong> the peak wavelength is <strong>499.62 nm<\/strong>, which lies in the green part of the visible spectrum \u2014 close to the middle of the range the human eye can see. This is no coincidence: our eyes evolved to make the most of sunlight.<\/p>\n<p>\n\r\n<\/section>\n<h2>How to Use the Calculator<\/h2>\n<ol>\n<li>Open the <strong>\"I want to find\"<\/strong> dropdown and choose whether you want the peak wavelength from a temperature, or the temperature from a peak wavelength. Only the relevant input field is shown.<\/li>\n<li>To find the wavelength: enter the surface temperature in <strong>\"Blackbody temperature (T)\"<\/strong> and pick its unit \u2014 K, \u00b0C or \u00b0F. Values in \u00b0C and \u00b0F are converted to kelvin automatically.<\/li>\n<li>To find the temperature: enter the wavelength in <strong>\"Peak wavelength (\u03bbmax)\"<\/strong> and choose nm, \u00b5m, mm or m.<\/li>\n<li>Read the result: the main quantity plus conversions, the Wien product, the peak frequency and the spectral band the peak falls in.<\/li>\n<li>Try the typical values shown in the field hints: the Sun \u2248 5800 K, an incandescent filament \u2248 2800 K, the human body \u2248 310 K.<\/li>\n<\/ol>\n<h2>What Is Wien's Displacement Law?<\/h2>\n<p>Every object above absolute zero emits electromagnetic radiation due to the thermal motion of its charged particles. An <em>idealised<\/em> emitter that absorbs and radiates perfectly at every wavelength is called a <strong>blackbody<\/strong>, and its spectrum has a characteristic bell shape described by Planck's law. Wien's displacement law, discovered by Wilhelm Wien in 1893, tells you where the top of that bell sits: the wavelength of maximum emission is inversely proportional to the absolute temperature.<\/p>\n<p>The law explains phenomena you see every day. As a piece of metal heats up, its peak emission moves from the invisible infrared into the visible range \u2014 the metal first glows dull red, then orange, then yellow-white as \\(\\lambda_{\\max}\\) shifts to shorter wavelengths. It is also a fundamental tool in astrophysics: by measuring the spectrum of a star and locating its peak, astronomers can determine the star's surface temperature without ever touching it. Hot blue stars peak at short wavelengths (a 20,000 K star peaks near 145 nm, in the ultraviolet), while cool red stars like Betelgeuse peak well into the infrared.<\/p>\n<p>Interpreting the result is straightforward: a peak below about 380 nm means most radiation is ultraviolet or beyond; between 380 and 750 nm the object radiates mainly visible light; above 750 nm it is dominated by infrared \u2014 heat radiation. Objects near room temperature (about 300 K) peak near 10 \u00b5m, which is why thermal imaging cameras are built to work in the long-wave infrared.<\/p>\n<h2>Typical Temperatures and Peak Wavelengths<\/h2>\n<table>\n<thead>\n<tr>\n<th>Object<\/th>\n<th>Temperature<\/th>\n<th>Peak wavelength<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Very hot blue star<\/td>\n<td>20,000 K<\/td>\n<td>144.9 nm (ultraviolet)<\/td>\n<\/tr>\n<tr>\n<td>Sun's surface<\/td>\n<td>5,800 K<\/td>\n<td>499.6 nm (green light)<\/td>\n<\/tr>\n<tr>\n<td>Incandescent filament<\/td>\n<td>2,800 K<\/td>\n<td>1,034.9 nm (infrared)<\/td>\n<\/tr>\n<tr>\n<td>Candle flame<\/td>\n<td>1,500 K<\/td>\n<td>1,931.8 nm (infrared)<\/td>\n<\/tr>\n<tr>\n<td>Molten lava<\/td>\n<td>1,200 K<\/td>\n<td>2,414.8 nm (infrared)<\/td>\n<\/tr>\n<tr>\n<td>Boiling water<\/td>\n<td>373 K<\/td>\n<td>7,768.5 nm (infrared)<\/td>\n<\/tr>\n<tr>\n<td>Human body<\/td>\n<td>310 K<\/td>\n<td>9,347.7 nm (infrared)<\/td>\n<\/tr>\n<tr>\n<td>Room-temperature wall<\/td>\n<td>293 K<\/td>\n<td>9,890.0 nm (infrared)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Assumptions and Limitations<\/h2>\n<ul>\n<li><strong>Blackbody assumption.<\/strong> The law applies exactly only to perfect blackbodies. Real materials have an emissivity below 1 that varies with wavelength, which shifts the actual peak slightly. Stars, furnaces and lamp filaments are close enough for most purposes; shiny metals are poorer approximations.<\/li>\n<li><strong>Wavelength vs frequency peak.<\/strong> The constant \\(b\\) applies to the spectrum plotted per unit wavelength. If the same spectrum is plotted per unit frequency, the peak occurs at a different place \u2014 the calculator shows this frequency peak using its own constant, \\(5.879 \\times 10^{10}\\) Hz\/K. The two peaks do <em>not<\/em> satisfy \\(\\lambda_{\\max} = c\/\\nu_{\\max}\\).<\/li>\n<li><strong>Temperature in kelvin.<\/strong> The law requires absolute temperature. If you enter \u00b0C or \u00b0F, the calculator converts them; a value at or below absolute zero is rejected.<\/li>\n<li><strong>Surface temperature only.<\/strong> The result is the effective surface temperature of the emitting region. It says nothing about the interior temperature of the object.<\/li>\n<li><strong>Peak \u2260 colour.<\/strong> \\(\\lambda_{\\max}\\) tells you where the spectrum peaks, not the perceived colour. The Sun peaks in the green yet appears white because it radiates strongly across the whole visible range.<\/li>\n<\/ul>\n<p>If you are working with other thermal physics problems, you may also find our <a href=\"https:\/\/wpcalc.com\/en\/physics\/carnot-efficiency-calculator\/\">Carnot Efficiency Calculator<\/a> useful for heat engines, or the <a href=\"https:\/\/wpcalc.com\/en\/physics\/speed-of-sound-in-air-calculator\/\">Speed of Sound in Air Calculator<\/a>, which uses temperature in a different way \u2014 sound speed in a gas depends directly on the gas temperature.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Enter a blackbody's temperature to find the wavelength where it emits the most radiation (or enter a peak wavelength to find the temperature). Results include unit conversions, the spectral band, and the peak frequency.<\/p>\n","protected":false},"author":3168,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[62],"tags":[87],"class_list":["post-66953","post","type-post","status-publish","format-standard","hentry","category-physics","tag-waves-optics"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/66953","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=66953"}],"version-history":[{"count":1,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/66953\/revisions"}],"predecessor-version":[{"id":66954,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/66953\/revisions\/66954"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=66953"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=66953"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=66953"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}