{"id":688,"date":"2026-05-31T20:21:49","date_gmt":"2026-05-31T18:21:49","guid":{"rendered":"https:\/\/e-car.day\/?page_id=688"},"modified":"2026-05-31T20:21:50","modified_gmt":"2026-05-31T18:21:50","slug":"ev-charging-time-calculator","status":"publish","type":"page","link":"https:\/\/e-car.day\/?page_id=688","title":{"rendered":"EV Charging Time Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"ev-charge-time-calc-e15x\">\n\n  <div class=\"eco-tool__header\">\n    <h2 class=\"eco-tool__title\">EV Charging Time Calculator<\/h2>\n\n    <p class=\"eco-tool__lead\">\n      Estimate how long it takes to charge your electric vehicle using different charger types and charging speeds.\n    <\/p>\n  <\/div>\n\n  <form class=\"eco-tool__form\" id=\"ev-charge-time-form-e15x\" novalidate>\n\n    <div class=\"eco-tool__grid3\">\n\n      <!-- Battery -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"ev-battery-e15x\">\n          Battery size<br>(kWh)\n        <\/label>\n\n        <input\n          class=\"eco-tool__input\"\n          id=\"ev-battery-e15x\"\n          type=\"number\"\n          min=\"1\"\n          step=\"1\"\n          value=\"75\"\n          inputmode=\"decimal\"\n        \/>\n\n        <div class=\"eco-tool__hint\">\n          Total usable battery capacity.\n        <\/div>\n      <\/div>\n\n      <!-- Current -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"ev-current-e15x\">\n          Current battery<br>level (%)\n        <\/label>\n\n        <input\n          class=\"eco-tool__input\"\n          id=\"ev-current-e15x\"\n          type=\"number\"\n          min=\"0\"\n          max=\"100\"\n          step=\"1\"\n          value=\"20\"\n          inputmode=\"numeric\"\n        \/>\n\n        <div class=\"eco-tool__hint\">\n          Current state of charge.\n        <\/div>\n      <\/div>\n\n      <!-- Target -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"ev-target-e15x\">\n          Target battery<br>level (%)\n        <\/label>\n\n        <input\n          class=\"eco-tool__input\"\n          id=\"ev-target-e15x\"\n          type=\"number\"\n          min=\"1\"\n          max=\"100\"\n          step=\"1\"\n          value=\"80\"\n          inputmode=\"numeric\"\n        \/>\n\n        <div class=\"eco-tool__hint\">\n          Daily charging is often limited to 80\u201390%.\n        <\/div>\n      <\/div>\n\n      <!-- Charger type -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"ev-charger-type-e15x\">\n          Charger type<br>\/ source\n        <\/label>\n\n        <select class=\"eco-tool__input\" id=\"ev-charger-type-e15x\">\n          <option value=\"2.3\">Standard outlet (2.3 kW)<\/option>\n          <option value=\"7.4\" selected>Home wallbox (7.4 kW)<\/option>\n          <option value=\"11\">3-phase home charger (11 kW)<\/option>\n          <option value=\"50\">DC fast charger (50 kW)<\/option>\n          <option value=\"150\">Ultra-fast charger (150 kW)<\/option>\n        <\/select>\n\n        <div class=\"eco-tool__hint\">\n          Charging power strongly affects charging time.\n        <\/div>\n      <\/div>\n\n      <!-- Efficiency -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"ev-efficiency-e15x\">\n          Charging<br>efficiency (%)\n        <\/label>\n\n        <input\n          class=\"eco-tool__input\"\n          id=\"ev-efficiency-e15x\"\n          type=\"number\"\n          min=\"50\"\n          max=\"100\"\n          step=\"1\"\n          value=\"90\"\n          inputmode=\"numeric\"\n        \/>\n\n        <div class=\"eco-tool__hint\">\n          Charging losses are normal.\n        <\/div>\n      <\/div>\n\n      <!-- Temperature -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"ev-temp-e15x\">\n          Outside temperature<br>(\u00b0C)\n        <\/label>\n\n        <input\n          class=\"eco-tool__input\"\n          id=\"ev-temp-e15x\"\n          type=\"number\"\n          min=\"-40\"\n          max=\"45\"\n          step=\"1\"\n          value=\"15\"\n          inputmode=\"numeric\"\n        \/>\n\n        <div class=\"eco-tool__hint\">\n          Cold temperatures can slow charging speed.\n        <\/div>\n      <\/div>\n\n    <\/div>\n\n    <div class=\"eco-tool__actions\">\n\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn\" id=\"ev-charge-time-btn-e15x\">\n        Calculate\n      <\/button>\n\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\" id=\"ev-charge-time-reset-e15x\">\n        Reset\n      <\/button>\n\n      <div class=\"eco-tool__error\" id=\"ev-charge-time-error-e15x\"><\/div>\n\n    <\/div>\n\n  <\/form>\n\n  <div class=\"eco-tool__result\" id=\"ev-charge-time-result-e15x\" hidden>\n\n    <h3 class=\"eco-tool__subtitle\">\n      Result\n    <\/h3>\n\n    <div class=\"eco-tool__cards\">\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">\n          Estimated charging time\n        <\/div>\n\n        <div class=\"eco-tool__metric-value\" id=\"ev-time-output-e15x\">\n          \u2014\n        <\/div>\n\n        <div class=\"eco-tool__metric-sub\">\n          Approximate charging duration.\n        <\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">\n          Energy added\n        <\/div>\n\n        <div class=\"eco-tool__metric-value\" id=\"ev-energy-output-e15x\">\n          \u2014\n        <\/div>\n\n        <div class=\"eco-tool__metric-sub\">\n          Estimated energy transferred to the battery.\n        <\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">\n          Effective charging power\n        <\/div>\n\n        <div class=\"eco-tool__metric-value\" id=\"ev-power-output-e15x\">\n          \u2014\n        <\/div>\n\n        <div class=\"eco-tool__metric-sub\">\n          Estimated real-world charging speed.\n        <\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">\n          Charging conditions\n        <\/div>\n\n        <div class=\"eco-tool__metric-value\" id=\"ev-condition-output-e15x\">\n          \u2014\n        <\/div>\n\n        <div class=\"eco-tool__metric-sub\">\n          Temperature and charging efficiency impact.\n        <\/div>\n      <\/div>\n\n    <\/div>\n\n    <p class=\"eco-tool__note\">\n      Approximate estimate only. Real charging times vary depending on battery chemistry, charging curve, battery temperature, charger sharing, and vehicle limits.\n    <\/p>\n\n  <\/div>\n\n  <details class=\"eco-tool__details\">\n\n    <summary class=\"eco-tool__summary\">\n      How we calculate\n    <\/summary>\n\n    <div class=\"eco-tool__details-body\">\n\n      <ul class=\"eco-tool__list\">\n        <li>Energy needed = battery size \u00d7 charge percentage difference<\/li>\n        <li>Effective charging power = charger power \u00d7 efficiency \u00d7 temperature factor<\/li>\n        <li>Charging time = energy needed \u00f7 effective charging power<\/li>\n      <\/ul>\n\n    <\/div>\n\n  <\/details>\n\n<\/div>\n\n<style>\n.eco-tool{\n  border:1px solid rgba(0,0,0,.12);\n  border-radius:12px;\n  padding:16px;\n}\n\n.eco-tool__header{\n  margin-bottom:12px;\n}\n\n.eco-tool__title{\n  margin:0 0 8px;\n}\n\n.eco-tool__lead{\n  margin:0;\n  opacity:.9;\n}\n\n.eco-tool__form{\n  margin-top:12px;\n}\n\n.eco-tool__grid3{\n  display:grid;\n  grid-template-columns:1fr;\n  gap:16px;\n}\n\n@media (min-width:860px){\n  .eco-tool__grid3{\n    grid-template-columns:1fr 1fr 1fr;\n  }\n}\n\n.eco-tool__field{\n  display:flex;\n  flex-direction:column;\n  gap:6px;\n}\n\n.eco-tool__label{\n  font-weight:600;\n}\n\n.eco-tool__input{\n  width:100%;\n  height:44px;\n  padding:0 12px;\n  border:1px solid rgba(0,0,0,.20);\n  border-radius:10px;\n  background:#fff;\n  box-sizing:border-box;\n  font:inherit;\n}\n\n.eco-tool select.eco-tool__input{\n  appearance:none;\n  -webkit-appearance:none;\n  line-height:44px;\n  padding-right:40px;\n\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\n  background-position:\n    calc(100% - 18px) 50%,\n    calc(100% - 12px) 50%;\n\n  background-size:6px 6px;\n  background-repeat:no-repeat;\n}\n\n.eco-tool__hint{\n  font-size:.92em;\n  opacity:.78;\n  min-height:38px;\n}\n\n.eco-tool__actions{\n  display:flex;\n  flex-wrap:wrap;\n  gap:10px;\n  align-items:center;\n  margin-top:16px;\n}\n\n.eco-tool__btn{\n  padding:10px 22px;\n}\n\n.eco-tool__btn--ghost{\n  background:transparent !important;\n  border:1px solid rgba(0,0,0,.20) !important;\n}\n\n.eco-tool__btn--ghost:hover,\n.eco-tool__btn--ghost:focus{\n  background:rgba(0,0,0,.06) !important;\n  border-color:rgba(0,0,0,.35) !important;\n}\n\n.eco-tool__error{\n  min-height:1.2em;\n  font-weight:600;\n  flex:1 1 240px;\n}\n\n.eco-tool__result{\n  margin-top:18px;\n}\n\n.eco-tool__subtitle{\n  margin:0 0 10px;\n}\n\n.eco-tool__cards{\n  display:grid;\n  gap:10px;\n  grid-template-columns:1fr;\n}\n\n@media (min-width:860px){\n  .eco-tool__cards{\n    grid-template-columns:1fr 1fr;\n  }\n}\n\n.eco-tool__card{\n  border:1px solid rgba(0,0,0,.12);\n  border-radius:12px;\n  padding:12px;\n}\n\n.eco-tool__metric-label{\n  opacity:.85;\n  font-weight:600;\n}\n\n.eco-tool__metric-value{\n  font-size:1.7em;\n  font-weight:800;\n  margin-top:6px;\n  line-height:1.1;\n}\n\n.eco-tool__metric-sub{\n  opacity:.85;\n  margin-top:6px;\n}\n\n.eco-tool__note{\n  margin-top:12px;\n  opacity:.9;\n}\n\n.eco-tool__details{\n  margin-top:16px;\n}\n\n.eco-tool__summary{\n  cursor:pointer;\n  font-weight:700;\n}\n\n.eco-tool__details-body{\n  margin-top:10px;\n}\n\n.eco-tool__list{\n  margin:0;\n  padding-left:18px;\n}\n<\/style>\n\n<script>\n(function(){\n\n  const S = \"e15x\";\n\n  const el = (id) => document.getElementById(id + \"-\" + S);\n\n  const batteryEl = el(\"ev-battery\");\n  const currentEl = el(\"ev-current\");\n  const targetEl = el(\"ev-target\");\n  const chargerEl = el(\"ev-charger-type\");\n  const efficiencyEl = el(\"ev-efficiency\");\n  const tempEl = el(\"ev-temp\");\n\n  const calcBtn = el(\"ev-charge-time-btn\");\n  const resetBtn = el(\"ev-charge-time-reset\");\n\n  const errorEl = el(\"ev-charge-time-error\");\n  const resultEl = el(\"ev-charge-time-result\");\n\n  const timeOutput = el(\"ev-time-output\");\n  const energyOutput = el(\"ev-energy-output\");\n  const powerOutput = el(\"ev-power-output\");\n  const conditionOutput = el(\"ev-condition-output\");\n\n  function setError(msg){\n    errorEl.textContent = msg || \"\";\n  }\n\n  function fmt(x){\n    return x.toLocaleString(undefined,{\n      minimumFractionDigits:1,\n      maximumFractionDigits:1\n    });\n  }\n\n  function getTempFactor(temp){\n\n    if(temp >= 15) return 1;\n    if(temp >= 5) return 0.95;\n    if(temp >= -5) return 0.85;\n    if(temp >= -15) return 0.72;\n\n    return 0.60;\n  }\n\n  function calculate(){\n\n    setError(\"\");\n\n    const battery = Number(batteryEl.value);\n    const current = Number(currentEl.value);\n    const target = Number(targetEl.value);\n    const chargerPower = Number(chargerEl.value);\n    const efficiency = Number(efficiencyEl.value) \/ 100;\n    const temp = Number(tempEl.value);\n\n    if(\n      !Number.isFinite(battery) || battery <= 0 ||\n      !Number.isFinite(current) || current < 0 || current >= 100 ||\n      !Number.isFinite(target) || target <= current || target > 100 ||\n      !Number.isFinite(chargerPower) || chargerPower <= 0 ||\n      !Number.isFinite(efficiency) || efficiency <= 0 ||\n      !Number.isFinite(temp)\n    ){\n      setError(\"Please enter valid values.\");\n      resultEl.hidden = true;\n      return;\n    }\n\n    const chargeDelta = (target - current) \/ 100;\n\n    const energyNeeded = battery * chargeDelta;\n\n    const tempFactor = getTempFactor(temp);\n\n    const effectivePower =\n      chargerPower *\n      efficiency *\n      tempFactor;\n\n    const chargingTime =\n      energyNeeded \/ effectivePower;\n\n    let condition = \"Good\";\n\n    if(temp < 5) condition = \"Cold weather impact\";\n    if(temp < -10) condition = \"Heavy winter charging slowdown\";\n\n    timeOutput.textContent =\n      fmt(chargingTime) + \" hours\";\n\n    energyOutput.textContent =\n      fmt(energyNeeded) + \" kWh\";\n\n    powerOutput.textContent =\n      fmt(effectivePower) + \" kW\";\n\n    conditionOutput.textContent =\n      condition;\n\n    resultEl.hidden = false;\n  }\n\n  function reset(){\n\n    setError(\"\");\n\n    batteryEl.value = \"75\";\n    currentEl.value = \"20\";\n    targetEl.value = \"80\";\n    chargerEl.value = \"7.4\";\n    efficiencyEl.value = \"90\";\n    tempEl.value = \"15\";\n\n    resultEl.hidden = true;\n  }\n\n  calcBtn.addEventListener(\"click\", calculate);\n  resetBtn.addEventListener(\"click\", reset);\n\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>EV Charging Time Calculator Estimate how long it takes to charge your electric vehicle using different charger types and charging speeds. Battery size(kWh) Total usable battery capacity. Current batterylevel (%)&hellip;<\/p>\n","protected":false},"author":25,"featured_media":0,"parent":652,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"_links":{"self":[{"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/pages\/688"}],"collection":[{"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/users\/25"}],"replies":[{"embeddable":true,"href":"https:\/\/e-car.day\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=688"}],"version-history":[{"count":1,"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/pages\/688\/revisions"}],"predecessor-version":[{"id":689,"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/pages\/688\/revisions\/689"}],"up":[{"embeddable":true,"href":"https:\/\/e-car.day\/index.php?rest_route=\/wp\/v2\/pages\/652"}],"wp:attachment":[{"href":"https:\/\/e-car.day\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=688"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}