{"id":2634,"date":"2026-03-01T01:05:04","date_gmt":"2026-02-28T23:05:04","guid":{"rendered":"https:\/\/science-x.net\/?page_id=2634"},"modified":"2026-03-06T18:49:49","modified_gmt":"2026-03-06T16:49:49","slug":"dew-point-calculator","status":"publish","type":"page","link":"https:\/\/science-x.net\/?page_id=2634","title":{"rendered":"Dew Point Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"eco-tool-dewpoint-2c7a1\">\n  <div class=\"eco-tool__header\">\n    <h2 class=\"eco-tool__title\">Dew Point Calculator<\/h2>\n    <p class=\"eco-tool__lead\">\n      Calculate dew point from air temperature and relative humidity (approximation). Dew point helps describe how humid it feels.\n    <\/p>\n  <\/div>\n\n  <form class=\"eco-tool__form\" id=\"eco-dp-form-2c7a1\" novalidate>\n    <div class=\"eco-tool__grid3\">\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-dp-temp-2c7a1\">Air temperature<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-dp-temp-2c7a1\" type=\"number\" value=\"25\" step=\"0.1\" inputmode=\"decimal\" \/>\n        <div class=\"eco-tool__hint\">Enter the current air temperature.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-dp-unit-2c7a1\">Temperature unit<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-dp-unit-2c7a1\">\n          <option value=\"C\" selected>\u00b0C<\/option>\n          <option value=\"F\">\u00b0F<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Choose Celsius or Fahrenheit.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-dp-rh-2c7a1\">Relative humidity (%)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-dp-rh-2c7a1\" type=\"number\" value=\"60\" min=\"1\" max=\"100\" step=\"1\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">1\u2013100%.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-dp-mode-2c7a1\">Formula<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-dp-mode-2c7a1\">\n          <option value=\"magnus\" selected>Magnus approximation<\/option>\n          <option value=\"simple\">Simple estimate<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Magnus is more accurate for everyday use.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-dp-round-2c7a1\">Precision<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-dp-round-2c7a1\">\n          <option value=\"1\" selected>1 decimal<\/option>\n          <option value=\"0\">Whole number<\/option>\n          <option value=\"2\">2 decimals<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Display rounding.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-dp-output-2c7a1\">Output note<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-dp-output-2c7a1\">\n          <option value=\"comfort\" selected>Comfort level<\/option>\n          <option value=\"details\">More details<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Adds a short interpretation.<\/div>\n      <\/div>\n\n    <\/div>\n\n    <div class=\"eco-tool__actions\">\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn\" id=\"eco-dp-calc-2c7a1\">Calculate<\/button>\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\" id=\"eco-dp-reset-2c7a1\">Reset<\/button>\n      <div class=\"eco-tool__error\" id=\"eco-dp-error-2c7a1\" aria-live=\"polite\"><\/div>\n    <\/div>\n  <\/form>\n\n  <div class=\"eco-tool__result\" id=\"eco-dp-result-2c7a1\" hidden>\n    <h3 class=\"eco-tool__subtitle\">Result<\/h3>\n\n    <div class=\"eco-tool__cards\">\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Dew point<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-dp-out-2c7a1\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-dp-out-sub-2c7a1\"><\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Comfort level<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-dp-feel-2c7a1\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-dp-feel-sub-2c7a1\"><\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__card eco-tool__card--wide\">\n      <div class=\"eco-tool__metric-label\">Educational note<\/div>\n      <div class=\"eco-tool__metric-sub\" id=\"eco-dp-note-2c7a1\"><\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n<style>\n.eco-tool{border:1px solid rgba(0,0,0,.12);border-radius:12px;padding:16px}\n.eco-tool__header{margin-bottom:12px}\n.eco-tool__title{margin:0 0 8px}\n.eco-tool__lead{margin:0;opacity:.9}\n.eco-tool__form{margin-top:12px}\n.eco-tool__grid3{display:grid;grid-template-columns:1fr;gap:16px}\n@media(min-width:860px){.eco-tool__grid3{grid-template-columns:1fr 1fr 1fr}}\n.eco-tool__field{display:flex;flex-direction:column;gap:6px}\n.eco-tool__label{font-weight:600}\n.eco-tool__input{width:100%;height:44px;padding:0 12px;border:1px solid rgba(0,0,0,.2);border-radius:10px;background:#fff;box-sizing:border-box;font:inherit}\n.eco-tool select.eco-tool__input{appearance:none;-webkit-appearance:none;line-height:44px;padding-right:40px;background-image:linear-gradient(45deg, transparent 50%, rgba(0,0,0,.60) 50%),linear-gradient(135deg, rgba(0,0,0,.60) 50%, transparent 50%);background-position:calc(100% - 18px) 50%,calc(100% - 12px) 50%;background-size:6px 6px;background-repeat:no-repeat}\n.eco-tool__hint{font-size:.92em;opacity:.78;min-height:38px}\n.eco-tool__actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:16px}\n.eco-tool__btn{padding:10px 22px}\n.eco-tool__btn--ghost{background:transparent!important;border:1px solid rgba(0,0,0,.2)!important}\n.eco-tool__btn--ghost:hover,.eco-tool__btn--ghost:focus{background:rgba(0,0,0,.06)!important;border-color:rgba(0,0,0,.35)!important}\n.eco-tool__error{min-height:1.2em;font-weight:600;flex:1 1 240px}\n.eco-tool__result{margin-top:16px}\n.eco-tool__subtitle{margin:0 0 10px}\n.eco-tool__cards{display:grid;gap:10px;grid-template-columns:1fr}\n@media(min-width:860px){.eco-tool__cards{grid-template-columns:1fr 1fr}}\n.eco-tool__card{border:1px solid rgba(0,0,0,.12);border-radius:12px;padding:12px}\n.eco-tool__card--wide{margin-top:10px}\n.eco-tool__metric-label{opacity:.85;font-weight:600}\n.eco-tool__metric-value{font-size:1.6em;font-weight:800;margin-top:6px;line-height:1.1}\n.eco-tool__metric-sub{opacity:.85;margin-top:6px}\n<\/style>\n\n<script>\n(function(){\n  const S=\"2c7a1\";\n  const el=id=>document.getElementById(id+\"-\"+S);\n\n  const tempEl=el(\"eco-dp-temp\");\n  const unitEl=el(\"eco-dp-unit\");\n  const rhEl=el(\"eco-dp-rh\");\n  const modeEl=el(\"eco-dp-mode\");\n  const roundEl=el(\"eco-dp-round\");\n  const outEl=el(\"eco-dp-output\");\n\n  const calcBtn=el(\"eco-dp-calc\");\n  const resetBtn=el(\"eco-dp-reset\");\n  const errEl=el(\"eco-dp-error\");\n\n  const resEl=el(\"eco-dp-result\");\n  const dpOut=el(\"eco-dp-out\");\n  const dpSub=el(\"eco-dp-out-sub\");\n  const feelOut=el(\"eco-dp-feel\");\n  const feelSub=el(\"eco-dp-feel-sub\");\n  const noteEl=el(\"eco-dp-note\");\n\n  function setError(m){ errEl.textContent=m||\"\"; }\n  function toC(t, unit){ return unit===\"F\" ? (t-32)*5\/9 : t; }\n  function toUnitC(dpC, unit){\n    if(unit===\"F\") return dpC*9\/5 + 32;\n    return dpC;\n  }\n  function r(x,d){\n    const p=Math.pow(10,d);\n    return Math.round(x*p)\/p;\n  }\n\n  function dewPointMagnus(Tc, RH){\n    \/\/ Magnus approximation (common form)\n    const a=17.62, b=243.12;\n    const gamma = (a*Tc)\/(b+Tc) + Math.log(RH\/100);\n    return (b*gamma)\/(a-gamma);\n  }\n\n  function dewPointSimple(Tc, RH){\n    \/\/ Very rough: Td \u2248 T - (100-RH)\/5\n    return Tc - (100-RH)\/5;\n  }\n\n  function comfortLabel(dpC){\n    if(dpC < 10) return {label:\"Dry\", sub:\"Usually comfortable, low humidity.\"};\n    if(dpC < 16) return {label:\"Comfortable\", sub:\"Most people feel fine.\"};\n    if(dpC < 19) return {label:\"Humid\", sub:\"Noticeably sticky.\"};\n    if(dpC < 22) return {label:\"Very humid\", sub:\"Uncomfortable for many.\"};\n    return {label:\"Oppressive\", sub:\"High humidity, can feel heavy.\"};\n  }\n\n  function calculate(){\n    setError(\"\");\n\n    const t=Number(tempEl.value);\n    const rh=Number(rhEl.value);\n    if(!Number.isFinite(t) || !Number.isFinite(rh) || rh < 1 || rh > 100){\n      setError(\"Please enter valid values (humidity 1\u2013100%).\");\n      resEl.hidden=true;\n      return;\n    }\n\n    const Tc = toC(t, unitEl.value);\n    const dpC = (modeEl.value===\"magnus\") ? dewPointMagnus(Tc, rh) : dewPointSimple(Tc, rh);\n\n    const dec = Number(roundEl.value);\n    const dpU = toUnitC(dpC, unitEl.value);\n\n    dpOut.textContent = r(dpU, dec).toLocaleString() + \" \u00b0\" + unitEl.value;\n    dpSub.textContent = `Temperature ${r(t, dec).toLocaleString()} \u00b0${unitEl.value} \u2022 RH ${Math.round(rh)}%`;\n\n    const c = comfortLabel(dpC);\n    feelOut.textContent = c.label;\n    feelSub.textContent = c.sub;\n\n    noteEl.textContent =\n      outEl.value===\"details\"\n        ? \"Dew point is the temperature at which air becomes saturated and water vapor begins to condense. Higher dew points usually feel more humid.\"\n        : \"Higher dew points generally feel more humid and sticky.\";\n\n    resEl.hidden=false;\n  }\n\n  function reset(){\n    setError(\"\");\n    tempEl.value=\"25\";\n    unitEl.value=\"C\";\n    rhEl.value=\"60\";\n    modeEl.value=\"magnus\";\n    roundEl.value=\"1\";\n    outEl.value=\"comfort\";\n    resEl.hidden=true;\n  }\n\n  calcBtn.addEventListener(\"click\", calculate);\n  resetBtn.addEventListener(\"click\", reset);\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Dew Point Calculator Calculate dew point from air temperature and relative humidity (approximation). Dew point helps describe how humid it feels. Air temperature Enter the current air temperature. Temperature unit&hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":2354,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"_links":{"self":[{"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages\/2634"}],"collection":[{"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/science-x.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2634"}],"version-history":[{"count":1,"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages\/2634\/revisions"}],"predecessor-version":[{"id":2635,"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages\/2634\/revisions\/2635"}],"up":[{"embeddable":true,"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages\/2354"}],"wp:attachment":[{"href":"https:\/\/science-x.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}