{"id":2974,"date":"2026-04-10T19:08:22","date_gmt":"2026-04-10T17:08:22","guid":{"rendered":"https:\/\/nature-o.net\/?page_id=2974"},"modified":"2026-04-10T19:08:57","modified_gmt":"2026-04-10T17:08:57","slug":"fridge-energy-cost-calculator","status":"publish","type":"page","link":"https:\/\/nature-o.net\/?page_id=2974","title":{"rendered":"Fridge Energy Cost Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"eco-tool-fridge-z38m6\">\n  <div class=\"eco-tool__header\">\n    <h2 class=\"eco-tool__title\">Fridge Energy Cost Calculator<\/h2>\n    <p class=\"eco-tool__lead\">\n      Estimate how much electricity your fridge uses and how much you could save by upgrading to a more efficient model.\n    <\/p>\n  <\/div>\n\n  <form class=\"eco-tool__form\" id=\"eco-fridge-form-z38m6\" novalidate>\n    <div class=\"eco-tool__grid3\">\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"size-z38m6\">Fridge<br>size<\/label>\n        <select class=\"eco-tool__input\" id=\"size-z38m6\">\n          <option value=\"small\">Small<\/option>\n          <option value=\"medium\" selected>Medium<\/option>\n          <option value=\"large\">Large<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Choose the closest size.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"age-z38m6\">Fridge age<br>(years)<\/label>\n        <input class=\"eco-tool__input\" id=\"age-z38m6\" type=\"number\" min=\"0\" step=\"1\" value=\"8\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">Older units usually use more energy.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"price-z38m6\">Electricity price<br>(per kWh)<\/label>\n        <input class=\"eco-tool__input\" id=\"price-z38m6\" type=\"number\" min=\"0\" step=\"0.01\" value=\"0.20\" inputmode=\"decimal\" \/>\n        <div class=\"eco-tool__hint\">Your local electricity price.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"grid-z38m6\">Grid CO\u2082 factor<\/label>\n        <select class=\"eco-tool__input\" id=\"grid-z38m6\">\n          <option value=\"0.10\">Low (renewable)<\/option>\n          <option value=\"0.40\" selected>Mixed<\/option>\n          <option value=\"0.80\">High (coal)<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Used for CO\u2082 estimate.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"upgrade-z38m6\">Upgrade to<\/label>\n        <select class=\"eco-tool__input\" id=\"upgrade-z38m6\">\n          <option value=\"standard\">Standard efficient<\/option>\n          <option value=\"high\" selected>High efficiency<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Compare with a newer model.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"temp-z38m6\">Kitchen temperature<\/label>\n        <select class=\"eco-tool__input\" id=\"temp-z38m6\">\n          <option value=\"0.95\">Cool<\/option>\n          <option value=\"1.00\" selected>Normal<\/option>\n          <option value=\"1.10\">Warm<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Warmer rooms increase energy use.<\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__actions\">\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn\" id=\"calc-z38m6\">Calculate<\/button>\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\" id=\"reset-z38m6\">Reset<\/button>\n      <div class=\"eco-tool__error\" id=\"error-z38m6\" aria-live=\"polite\"><\/div>\n    <\/div>\n  <\/form>\n\n  <div class=\"eco-tool__result\" id=\"result-z38m6\" 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\">Current fridge<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"current-z38m6\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"currentsub-z38m6\"><\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">After upgrade<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"new-z38m6\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"newsub-z38m6\"><\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__card eco-tool__card--wide\">\n      <div class=\"eco-tool__metric-label\">Potential savings<\/div>\n      <div class=\"eco-tool__metric-value\" id=\"saved-z38m6\">\u2014<\/div>\n      <div class=\"eco-tool__metric-sub\" id=\"tip-z38m6\"><\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n<style>\n.eco-tool{border:1px solid 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6px;background-repeat:no-repeat;\n}\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,.20) !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=\"z38m6\";\n  const el=id=>document.getElementById(id+\"-\"+S);\n\n  const BASE={\n    small:220,\n    medium:320,\n    large:450\n  };\n\n  const UPGRADE={\n    standard:0.78,\n    high:0.60\n  };\n\n  function fmt(n){\n    return (Math.round(n*10)\/10).toLocaleString(undefined,{minimumFractionDigits:1,maximumFractionDigits:1});\n  }\n\n  function calculate(){\n    const size=el(\"size\").value;\n    const age=Number(el(\"age\").value);\n    const price=Number(el(\"price\").value);\n    const grid=Number(el(\"grid\").value);\n    const upgrade=el(\"upgrade\").value;\n    const tempFactor=Number(el(\"temp\").value);\n\n    if(!Number.isFinite(age)||age<0||!Number.isFinite(price)||price<0){\n      el(\"error\").textContent=\"Please enter valid values.\";\n      el(\"result\").hidden=true;\n      return;\n    }\n\n    el(\"error\").textContent=\"\";\n\n    const ageFactor = age <= 3 ? 1.0 : age <= 7 ? 1.12 : age <= 12 ? 1.25 : 1.40;\n    const currentKwh = BASE[size] * ageFactor * tempFactor;\n    const newKwh = BASE[size] * UPGRADE[upgrade] * tempFactor;\n\n    const currentCost = currentKwh * price;\n    const newCost = newKwh * price;\n\n    const savedKwh = currentKwh - newKwh;\n    const savedCost = currentCost - newCost;\n    const savedCo2 = savedKwh * grid;\n\n    el(\"current\").textContent = `${fmt(currentKwh)} kWh\/year`;\n    el(\"currentsub\").textContent = `${fmt(currentCost)} per year`;\n\n    el(\"new\").textContent = `${fmt(newKwh)} kWh\/year`;\n    el(\"newsub\").textContent = `${fmt(newCost)} per year`;\n\n    el(\"saved\").textContent = `${fmt(savedCost)} saved\/year`;\n    el(\"tip\").textContent = `${fmt(savedKwh)} kWh and ${fmt(savedCo2)} kg CO\u2082 avoided per year.`;\n\n    el(\"result\").hidden = false;\n  }\n\n  function reset(){\n    el(\"size\").value=\"medium\";\n    el(\"age\").value=\"8\";\n    el(\"price\").value=\"0.20\";\n    el(\"grid\").value=\"0.40\";\n    el(\"upgrade\").value=\"high\";\n    el(\"temp\").value=\"1.00\";\n    el(\"error\").textContent=\"\";\n    el(\"result\").hidden=true;\n  }\n\n  el(\"calc\").addEventListener(\"click\", calculate);\n  el(\"reset\").addEventListener(\"click\", reset);\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Fridge Energy Cost Calculator Estimate how much electricity your fridge uses and how much you could save by upgrading to a more efficient model. Fridgesize SmallMediumLarge Choose the closest size.&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\/2974"}],"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=2974"}],"version-history":[{"count":2,"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages\/2974\/revisions"}],"predecessor-version":[{"id":2976,"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages\/2974\/revisions\/2976"}],"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=2974"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}