{"id":2274,"date":"2026-01-29T23:36:49","date_gmt":"2026-01-29T21:36:49","guid":{"rendered":"https:\/\/nature-o.net\/?page_id=2274"},"modified":"2026-02-05T00:18:49","modified_gmt":"2026-02-04T22:18:49","slug":"air-conditioner-cost-co%e2%82%82-calculator","status":"publish","type":"page","link":"https:\/\/nature-o.net\/?page_id=2274","title":{"rendered":"Air Conditioner Cost &amp; CO\u2082 Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"eco-tool-ac-71c0a\">\n  <div class=\"eco-tool__header\">\n    <h2 class=\"eco-tool__title\">Air Conditioner Cost &#038; CO\u2082 Calculator<\/h2>\n    <p class=\"eco-tool__lead\">\n      Estimate seasonal electricity use, cost, and CO\u2082 for an air conditioner. Includes efficiency presets and a simple Eco-mode comparison.\n    <\/p>\n  <\/div>\n\n  <form class=\"eco-tool__form\" id=\"eco-ac-form-71c0a\" novalidate>\n    <div class=\"eco-tool__grid3\">\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-ac-inputmode-71c0a\">Input mode<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-ac-inputmode-71c0a\">\n          <option value=\"kw\" selected>Cooling power (kW)<\/option>\n          <option value=\"btu\">Cooling capacity (BTU\/h)<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Choose how you want to enter AC capacity.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\" id=\"eco-ac-kw-wrap-71c0a\">\n        <label class=\"eco-tool__label\" for=\"eco-ac-kw-71c0a\">Cooling power (kW)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-ac-kw-71c0a\" type=\"number\" min=\"0\" step=\"0.1\" value=\"2.5\" inputmode=\"decimal\" \/>\n        <div class=\"eco-tool__hint\">Typical room AC: ~2.0\u20134.0 kW cooling.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\" id=\"eco-ac-btu-wrap-71c0a\" hidden>\n        <label class=\"eco-tool__label\" for=\"eco-ac-btu-71c0a\">Cooling capacity (BTU\/h)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-ac-btu-71c0a\" type=\"number\" min=\"0\" step=\"500\" value=\"9000\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">Common sizes: 9000 \/ 12000 \/ 18000 BTU\/h.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-ac-effpreset-71c0a\">Efficiency preset<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-ac-effpreset-71c0a\">\n          <option value=\"2.8\">Older \/ basic (COP \u2248 2.8)<\/option>\n          <option value=\"3.4\" selected>Typical (COP \u2248 3.4)<\/option>\n          <option value=\"4.2\">Efficient inverter (COP \u2248 4.2)<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Higher COP means lower electricity use.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-ac-hours-71c0a\">Hours per day<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-ac-hours-71c0a\" type=\"number\" min=\"0\" step=\"0.5\" value=\"6\" inputmode=\"decimal\" \/>\n        <div class=\"eco-tool__hint\">How long the AC runs on a typical day.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-ac-daysweek-71c0a\">Days per week<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-ac-daysweek-71c0a\">\n          <option value=\"3\">3 days\/week<\/option>\n          <option value=\"5\" selected>5 days\/week<\/option>\n          <option value=\"7\">7 days\/week<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Used for seasonal estimate.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-ac-months-71c0a\">Cooling season length<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-ac-months-71c0a\">\n          <option value=\"2\">2 months<\/option>\n          <option value=\"3\" selected>3 months<\/option>\n          <option value=\"4\">4 months<\/option>\n          <option value=\"5\">5 months<\/option>\n          <option value=\"6\">6 months<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">How many months per year you usually cool.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-ac-price-71c0a\">Electricity price (per kWh)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-ac-price-71c0a\" type=\"number\" min=\"0\" step=\"0.01\" value=\"0.20\" inputmode=\"decimal\" \/>\n        <div class=\"eco-tool__hint\">Example: 0.20 per kWh.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-ac-currency-71c0a\">Currency (display)<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-ac-currency-71c0a\">\n          <option value=\"$\">$<\/option>\n          <option value=\"\u20ac\" selected>\u20ac<\/option>\n          <option value=\"\u00a3\">\u00a3<\/option>\n          <option value=\"\u20bd\">\u20bd<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Only affects formatting.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-ac-load-71c0a\">Real-world load<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-ac-load-71c0a\">\n          <option value=\"0.55\">Light (\u224855% average load)<\/option>\n          <option value=\"0.70\" selected>Typical (\u224870% average load)<\/option>\n          <option value=\"0.85\">Heavy (\u224885% average load)<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">AC rarely runs at full cooling power constantly.<\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__actions\">\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn\" id=\"eco-ac-calc-71c0a\">Calculate<\/button>\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\" id=\"eco-ac-reset-71c0a\">Reset<\/button>\n      <div class=\"eco-tool__error\" id=\"eco-ac-error-71c0a\" aria-live=\"polite\"><\/div>\n    <\/div>\n  <\/form>\n\n  <div class=\"eco-tool__result\" id=\"eco-ac-result-71c0a\" 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\">Seasonal electricity<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-ac-kwh-71c0a\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-ac-kwhsub-71c0a\">\u2014<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Seasonal cost<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-ac-cost-71c0a\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-ac-costsub-71c0a\">\u2014<\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__cards\">\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Seasonal CO\u2082<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-ac-co2-71c0a\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-ac-co2sub-71c0a\">\u2014<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Eco mode comparison<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-ac-eco-71c0a\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-ac-ecosub-71c0a\">\u2014<\/div>\n      <\/div>\n    <\/div>\n\n    <p class=\"eco-tool__note\">\n      This is a simplified estimate. Real consumption depends on indoor setpoint, insulation, humidity, and outdoor temperature.\n    <\/p>\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\n.eco-tool__grid3{ display:grid; grid-template-columns:1fr; gap:16px; margin-top:12px; }\n@media (min-width:860px){ .eco-tool__grid3{ grid-template-columns:1fr 1fr 1fr; } }\n\n.eco-tool__field{ display:flex; flex-direction:column; gap:6px; }\n.eco-tool__label{ font-weight:600; }\n.eco-tool__input{\n  width:100%; height:44px; padding:0 12px;\n  border:1px solid rgba(0,0,0,.20); border-radius:10px; background:#fff;\n  box-sizing:border-box; font:inherit;\n}\n.eco-tool select.eco-tool__input{\n  appearance:none; -webkit-appearance:none; line-height:44px; padding-right:40px;\n  background-image:\n    linear-gradient(45deg, transparent 50%, rgba(0,0,0,.60) 50%),\n    linear-gradient(135deg, rgba(0,0,0,.60) 50%, transparent 50%);\n  background-position: calc(100% - 18px) 50%, calc(100% - 12px) 50%;\n  background-size:6px 6px; background-repeat:no-repeat;\n}\n.eco-tool__hint{ font-size:.92em; opacity:.78; min-height:38px; }\n\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,.20) !important; }\n.eco-tool__btn--ghost:hover, .eco-tool__btn--ghost:focus{\n  background:rgba(0,0,0,.06) !important; border-color:rgba(0,0,0,.35) !important;\n}\n.eco-tool__error{ min-height:1.2em; font-weight:600; flex:1 1 240px; }\n\n.eco-tool__result{ margin-top:16px; }\n.eco-tool__subtitle{ margin:0 0 10px; }\n\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\n.eco-tool__card{ border:1px solid rgba(0,0,0,.12); border-radius:12px; padding:12px; }\n.eco-tool__metric-label{ opacity:.85; font-weight:600; }\n.eco-tool__metric-value{ font-size:1.7em; font-weight:900; margin-top:6px; line-height:1.1; }\n.eco-tool__metric-sub{ opacity:.85; margin-top:6px; }\n.eco-tool__note{ margin:10px 0 0; opacity:.9; }\n<\/style>\n\n<script>\n(function(){\n  const S=\"71c0a\";\n  const el=(id)=>document.getElementById(id+\"-\"+S);\n\n  const modeEl=el(\"eco-ac-inputmode\");\n  const kwWrap=el(\"eco-ac-kw-wrap\");\n  const btuWrap=el(\"eco-ac-btu-wrap\");\n  const kwEl=el(\"eco-ac-kw\");\n  const btuEl=el(\"eco-ac-btu\");\n\n  const copEl=el(\"eco-ac-effpreset\");\n  const hoursEl=el(\"eco-ac-hours\");\n  const daysEl=el(\"eco-ac-daysweek\");\n  const monthsEl=el(\"eco-ac-months\");\n  const priceEl=el(\"eco-ac-price\");\n  const curEl=el(\"eco-ac-currency\");\n  const loadEl=el(\"eco-ac-load\");\n\n  const calcBtn=el(\"eco-ac-calc\");\n  const resetBtn=el(\"eco-ac-reset\");\n  const errEl=el(\"eco-ac-error\");\n\n  const resEl=el(\"eco-ac-result\");\n  const kwhOut=el(\"eco-ac-kwh\");\n  const kwhSub=el(\"eco-ac-kwhsub\");\n  const costOut=el(\"eco-ac-cost\");\n  const costSub=el(\"eco-ac-costsub\");\n  const co2Out=el(\"eco-ac-co2\");\n  const co2Sub=el(\"eco-ac-co2sub\");\n  const ecoOut=el(\"eco-ac-eco\");\n  const ecoSub=el(\"eco-ac-ecosub\");\n\n  \/\/ Hidden average grid factor\n  const GRID_CO2 = 0.35; \/\/ kg\/kWh\n  \/\/ Eco mode assumed savings (toy average)\n  const ECO_SAVING = 0.12; \/\/ 12%\n\n  function setErr(m){ errEl.textContent=m||\"\"; }\n  function n(v){ return Number(v); }\n  function money(x){\n    const sym=curEl.value||\"$\";\n    const v=Math.round(x*100)\/100;\n    return sym+v.toLocaleString(undefined,{minimumFractionDigits:2,maximumFractionDigits:2});\n  }\n  function fmt1(x){\n    const v=Math.round(x*10)\/10;\n    return v.toLocaleString(undefined,{minimumFractionDigits:1,maximumFractionDigits:1});\n  }\n\n  function syncMode(){\n    const m=modeEl.value;\n    if(m===\"kw\"){\n      kwWrap.hidden=false; btuWrap.hidden=true;\n    }else{\n      kwWrap.hidden=true; btuWrap.hidden=false;\n    }\n  }\n\n  function getCoolingKW(){\n    if(modeEl.value===\"kw\"){\n      const kw=n(kwEl.value);\n      return Number.isFinite(kw) ? kw : null;\n    }\n    const btu=n(btuEl.value);\n    if(!Number.isFinite(btu)) return null;\n    \/\/ 1 kW cooling \u2248 3412 BTU\/h\n    return btu\/3412;\n  }\n\n  function calculate(){\n    setErr(\"\");\n    const coolKW = getCoolingKW();\n    const cop=n(copEl.value);\n    const h=n(hoursEl.value);\n    const d=n(daysEl.value);\n    const m=n(monthsEl.value);\n    const p=n(priceEl.value);\n    const load=n(loadEl.value);\n\n    if(!Number.isFinite(coolKW) || coolKW<=0){ setErr(\"Please enter a valid cooling capacity (greater than 0).\"); resEl.hidden=true; return; }\n    if(!Number.isFinite(cop) || cop<=0){ setErr(\"Please choose a valid efficiency preset.\"); resEl.hidden=true; return; }\n    if(!Number.isFinite(h) || h<0){ setErr(\"Please enter hours per day (0 or more).\"); resEl.hidden=true; return; }\n    if(!Number.isFinite(p) || p<0){ setErr(\"Please enter electricity price (0 or more).\"); resEl.hidden=true; return; }\n\n    \/\/ Electrical input power \u2248 cooling power \/ COP, then scaled by average load\n    const elecKW = (coolKW \/ cop) * load;\n\n    \/\/ season days: months * 30.4 * (days\/week)\/7\n    const seasonDays = (m*30.4) * (d\/7);\n    const seasonHours = seasonDays * h;\n\n    const kWh = elecKW * seasonHours;\n    const cost = kWh * p;\n    const co2 = kWh * GRID_CO2;\n\n    \/\/ eco mode comparison\n    const kWhEco = kWh * (1 - ECO_SAVING);\n    const costEco = kWhEco * p;\n    const co2Eco = kWhEco * GRID_CO2;\n\n    kwhOut.textContent = `${Math.round(kWh).toLocaleString()} kWh`;\n    kwhSub.textContent = `Season hours \u2248 ${Math.round(seasonHours).toLocaleString()} h, average input \u2248 ${fmt1(elecKW)} kW.`;\n\n    costOut.textContent = money(cost);\n    costSub.textContent = `${Math.round(kWh).toLocaleString()} kWh \u00d7 ${p} per kWh.`;\n\n    co2Out.textContent = `${Math.round(co2).toLocaleString()} kg CO\u2082`;\n    co2Sub.textContent = `Uses average grid factor ${GRID_CO2} kg\/kWh.`;\n\n    ecoOut.textContent = `Save ~${money(cost - costEco)}`;\n    ecoSub.textContent = `Eco mode (\u2248${Math.round(ECO_SAVING*100)}% less): ${Math.round(kWhEco).toLocaleString()} kWh and ${Math.round(co2Eco).toLocaleString()} kg CO\u2082.`;\n\n    resEl.hidden=false;\n  }\n\n  function reset(){\n    setErr(\"\");\n    modeEl.value=\"kw\";\n    kwEl.value=\"2.5\";\n    btuEl.value=\"9000\";\n    copEl.value=\"3.4\";\n    hoursEl.value=\"6\";\n    daysEl.value=\"5\";\n    monthsEl.value=\"3\";\n    priceEl.value=\"0.20\";\n    curEl.value=\"\u20ac\";\n    loadEl.value=\"0.70\";\n    resEl.hidden=true;\n    syncMode();\n  }\n\n  modeEl.addEventListener(\"change\", syncMode);\n  calcBtn.addEventListener(\"click\", calculate);\n  resetBtn.addEventListener(\"click\", reset);\n\n  syncMode();\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Air Conditioner Cost &#038; CO\u2082 Calculator Estimate seasonal electricity use, cost, and CO\u2082 for an air conditioner. Includes efficiency presets and a simple Eco-mode comparison. Input mode Cooling power (kW)Cooling&hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":2452,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"_links":{"self":[{"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages\/2274"}],"collection":[{"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nature-o.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2274"}],"version-history":[{"count":5,"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages\/2274\/revisions"}],"predecessor-version":[{"id":2456,"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages\/2274\/revisions\/2456"}],"up":[{"embeddable":true,"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages\/2452"}],"wp:attachment":[{"href":"https:\/\/nature-o.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2274"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}