{"id":2889,"date":"2026-04-03T22:44:42","date_gmt":"2026-04-03T20:44:42","guid":{"rendered":"https:\/\/nature-o.net\/?page_id=2889"},"modified":"2026-04-03T22:44:43","modified_gmt":"2026-04-03T20:44:43","slug":"emergency-water-supply-calculator","status":"publish","type":"page","link":"https:\/\/nature-o.net\/?page_id=2889","title":{"rendered":"Emergency Water Supply Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"eco-tool-emergency-water-g91m3\">\n  <div class=\"eco-tool__header\">\n    <h2 class=\"eco-tool__title\">Emergency Water Supply Calculator<\/h2>\n    <p class=\"eco-tool__lead\">\n      Estimate how much emergency water your household may need for drinking and basic hygiene.\n    <\/p>\n  <\/div>\n\n  <form class=\"eco-tool__form\" id=\"eco-water-form-g91m3\" novalidate>\n    <div class=\"eco-tool__grid3\">\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"people-g91m3\">People in<br>household<\/label>\n        <input class=\"eco-tool__input\" id=\"people-g91m3\" type=\"number\" min=\"1\" step=\"1\" value=\"2\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">Total number of people.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"days-g91m3\">Days of<br>supply<\/label>\n        <input class=\"eco-tool__input\" id=\"days-g91m3\" type=\"number\" min=\"1\" step=\"1\" value=\"3\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">How many days you want to prepare for.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"level-g91m3\">Preparedness<br>level<\/label>\n        <select class=\"eco-tool__input\" id=\"level-g91m3\">\n          <option value=\"basic\">Basic<\/option>\n          <option value=\"standard\" selected>Standard<\/option>\n          <option value=\"extended\">Extended<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">More hygiene water = higher total.<\/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-g91m3\">Calculate<\/button>\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\" id=\"reset-g91m3\">Reset<\/button>\n      <div class=\"eco-tool__error\" id=\"error-g91m3\" aria-live=\"polite\"><\/div>\n    <\/div>\n  <\/form>\n\n  <div class=\"eco-tool__result\" id=\"result-g91m3\" 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\">Total water needed<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"liters-g91m3\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"gallons-g91m3\"><\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Daily household need<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"daily-g91m3\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"perperson-g91m3\"><\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__card eco-tool__card--wide\">\n      <div class=\"eco-tool__metric-label\">Storage tip<\/div>\n      <div class=\"eco-tool__metric-sub\" id=\"tip-g91m3\"><\/div>\n    <\/div>\n  <\/div>\n\n  <details class=\"eco-tool__details\">\n    <summary class=\"eco-tool__summary\">How we calculate<\/summary>\n    <div class=\"eco-tool__details-body\">\n      <p class=\"eco-tool__text\">\n        We use a simple per-person daily water estimate. Basic covers drinking only, standard adds minimal hygiene, and extended includes a larger safety margin.\n      <\/p>\n      <ul class=\"eco-tool__list\">\n        <li><strong>Basic:<\/strong> 3 liters per person\/day<\/li>\n        <li><strong>Standard:<\/strong> 5 liters per person\/day<\/li>\n        <li><strong>Extended:<\/strong> 7 liters per person\/day<\/li>\n      <\/ul>\n    <\/div>\n  <\/details>\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,.20);border-radius:10px;background:#fff;box-sizing:border-box;font:inherit;}\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.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.eco-tool__details{margin-top:14px;}\n.eco-tool__summary{cursor:pointer;font-weight:700;}\n.eco-tool__details-body{margin-top:10px;}\n.eco-tool__text{margin:0 0 10px;}\n.eco-tool__list{margin:0;padding-left:18px;}\n<\/style>\n\n<script>\n(function(){\n  const S = \"g91m3\";\n  const el = (id) => document.getElementById(id + \"-\" + S);\n\n  const peopleEl = el(\"people\");\n  const daysEl = el(\"days\");\n  const levelEl = el(\"level\");\n  const calcBtn = el(\"calc\");\n  const resetBtn = el(\"reset\");\n  const errorEl = el(\"error\");\n  const resultEl = el(\"result\");\n  const litersEl = el(\"liters\");\n  const gallonsEl = el(\"gallons\");\n  const dailyEl = el(\"daily\");\n  const perPersonEl = el(\"perperson\");\n  const tipEl = el(\"tip\");\n\n  const LEVELS = {\n    basic: 3,\n    standard: 5,\n    extended: 7\n  };\n\n  function setError(msg){\n    errorEl.textContent = msg || \"\";\n  }\n\n  function fmt(n){\n    return Math.round(n).toLocaleString();\n  }\n\n  function calculate(){\n    setError(\"\");\n\n    const people = Number(peopleEl.value);\n    const days = Number(daysEl.value);\n    const level = levelEl.value;\n    const perPersonPerDay = LEVELS[level] || LEVELS.standard;\n\n    if (!Number.isFinite(people) || people < 1){\n      setError(\"Please enter at least 1 person.\");\n      resultEl.hidden = true;\n      return;\n    }\n\n    if (!Number.isFinite(days) || days < 1){\n      setError(\"Please enter at least 1 day.\");\n      resultEl.hidden = true;\n      return;\n    }\n\n    const totalLiters = people * days * perPersonPerDay;\n    const totalGallons = totalLiters * 0.264172;\n    const dailyHousehold = people * perPersonPerDay;\n\n    litersEl.textContent = `${fmt(totalLiters)} liters`;\n    gallonsEl.textContent = `${fmt(totalGallons)} gallons`;\n    dailyEl.textContent = `${fmt(dailyHousehold)} liters\/day`;\n    perPersonEl.textContent = `${perPersonPerDay} liters per person\/day`;\n\n    if (totalLiters <= 30){\n      tipEl.textContent = \"A few sealed bottles may be enough for this plan.\";\n    } else if (totalLiters <= 100){\n      tipEl.textContent = \"Consider storing water in multiple containers for easier handling.\";\n    } else {\n      tipEl.textContent = \"Use larger storage containers and rotate your stored water regularly.\";\n    }\n\n    resultEl.hidden = false;\n  }\n\n  function reset(){\n    setError(\"\");\n    peopleEl.value = \"2\";\n    daysEl.value = \"3\";\n    levelEl.value = \"standard\";\n    resultEl.hidden = true;\n  }\n\n  calcBtn.addEventListener(\"click\", calculate);\n  resetBtn.addEventListener(\"click\", reset);\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Emergency Water Supply Calculator Estimate how much emergency water your household may need for drinking and basic hygiene. People inhousehold Total number of people. Days ofsupply How many days you&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\/2889"}],"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=2889"}],"version-history":[{"count":1,"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages\/2889\/revisions"}],"predecessor-version":[{"id":2890,"href":"https:\/\/nature-o.net\/index.php?rest_route=\/wp\/v2\/pages\/2889\/revisions\/2890"}],"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=2889"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}