{"id":2647,"date":"2026-03-14T18:57:00","date_gmt":"2026-03-14T16:57:00","guid":{"rendered":"https:\/\/bio-me.bio\/?page_id=2647"},"modified":"2026-03-14T18:57:00","modified_gmt":"2026-03-14T16:57:00","slug":"water-intake-calculator","status":"publish","type":"page","link":"https:\/\/bio-me.bio\/?page_id=2647","title":{"rendered":"Water Intake Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"eco-tool-waterbody-1f4c8\">\n  <div class=\"eco-tool__header\">\n    <h2 class=\"eco-tool__title\">Water Intake Calculator<\/h2>\n    <p class=\"eco-tool__lead\">\n      Estimate a practical daily water intake target based on body weight, activity, climate, and caffeine intake.\n    <\/p>\n  <\/div>\n\n  <form class=\"eco-tool__form\" id=\"eco-waterbody-form-1f4c8\" novalidate>\n    <div class=\"eco-tool__grid3\">\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-waterbody-weight-1f4c8\">Body weight (kg)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-waterbody-weight-1f4c8\" type=\"number\" min=\"20\" max=\"300\" step=\"0.1\" value=\"70\" inputmode=\"decimal\" \/>\n        <div class=\"eco-tool__hint\">Used as the base for your daily water estimate.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-waterbody-activity-1f4c8\">Daily activity<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-waterbody-activity-1f4c8\">\n          <option value=\"low\" selected>Low \/ mostly sedentary<\/option>\n          <option value=\"moderate\">Moderate \/ regular walking or exercise<\/option>\n          <option value=\"high\">High \/ hard training or physical work<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Sweat and movement can raise water needs.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-waterbody-climate-1f4c8\">Climate \/ heat<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-waterbody-climate-1f4c8\">\n          <option value=\"cool\" selected>Cool \/ mild<\/option>\n          <option value=\"warm\">Warm<\/option>\n          <option value=\"hot\">Hot \/ very humid<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Hot weather usually increases fluid needs.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-waterbody-exercise-1f4c8\">Exercise time (minutes\/day)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-waterbody-exercise-1f4c8\" type=\"number\" min=\"0\" max=\"300\" step=\"5\" value=\"30\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">Extra movement can increase fluid demand.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-waterbody-caffeine-1f4c8\">Caffeinated drinks\/day<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-waterbody-caffeine-1f4c8\" type=\"number\" min=\"0\" max=\"20\" step=\"1\" value=\"2\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">High caffeine intake may slightly increase hydration needs.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-waterbody-food-1f4c8\">Water-rich foods<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-waterbody-food-1f4c8\">\n          <option value=\"low\" selected>Low<\/option>\n          <option value=\"medium\">Moderate<\/option>\n          <option value=\"high\">High<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Fruit, vegetables, soups, and similar foods contribute some fluids.<\/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-waterbody-calc-1f4c8\">Calculate<\/button>\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\" id=\"eco-waterbody-reset-1f4c8\">Reset<\/button>\n      <div class=\"eco-tool__error\" id=\"eco-waterbody-error-1f4c8\" aria-live=\"polite\"><\/div>\n    <\/div>\n  <\/form>\n\n  <div class=\"eco-tool__result\" id=\"eco-waterbody-result-1f4c8\" 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\">Suggested daily intake<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-waterbody-target-1f4c8\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-waterbody-range-1f4c8\"><\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Easy serving plan<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-waterbody-servings-1f4c8\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-waterbody-sub-1f4c8\"><\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__card eco-tool__card--wide\">\n      <div class=\"eco-tool__metric-label\">Interpretation<\/div>\n      <div class=\"eco-tool__metric-sub\" id=\"eco-waterbody-note-1f4c8\"><\/div>\n    <\/div>\n\n    <p class=\"eco-tool__note\">\n      This is a practical estimate, not medical advice. Some health conditions may require a different fluid strategy.\n    <\/p>\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 start with a simple bodyweight-based estimate, then adjust for exercise, climate, caffeine, and water-rich foods.\n      <\/p>\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\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\n.eco-tool__field{ display:flex; flex-direction:column; gap:6px; }\n.eco-tool__label{ font-weight:600; }\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.eco-tool select.eco-tool__input{\n  appearance:none;\n  -webkit-appearance:none;\n  line-height:44px;\n  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:\n    calc(100% - 18px) 50%,\n    calc(100% - 12px) 50%;\n  background-size:6px 6px;\n  background-repeat:no-repeat;\n}\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{ 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__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\n.eco-tool__note{ margin:10px 0 0; opacity:.9; }\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<\/style>\n\n<script>\n(function(){\n  const S = \"1f4c8\";\n  const el = (id) => document.getElementById(id + \"-\" + S);\n\n  const weightEl = el(\"eco-waterbody-weight\");\n  const activityEl = el(\"eco-waterbody-activity\");\n  const climateEl = el(\"eco-waterbody-climate\");\n  const exerciseEl = el(\"eco-waterbody-exercise\");\n  const caffeineEl = el(\"eco-waterbody-caffeine\");\n  const foodEl = el(\"eco-waterbody-food\");\n\n  const calcBtn = el(\"eco-waterbody-calc\");\n  const resetBtn = el(\"eco-waterbody-reset\");\n  const errorEl = el(\"eco-waterbody-error\");\n\n  const resultEl = el(\"eco-waterbody-result\");\n  const targetEl = el(\"eco-waterbody-target\");\n  const rangeEl = el(\"eco-waterbody-range\");\n  const servingsEl = el(\"eco-waterbody-servings\");\n  const subEl = el(\"eco-waterbody-sub\");\n  const noteEl = el(\"eco-waterbody-note\");\n\n  function setError(msg){ errorEl.textContent = msg || \"\"; }\n\n  function calculate(){\n    setError(\"\");\n\n    const weight = Number(weightEl.value);\n    const exercise = Number(exerciseEl.value);\n    const caffeine = Number(caffeineEl.value);\n\n    if (!Number.isFinite(weight) || weight <= 0){\n      setError(\"Please enter a valid body weight.\");\n      resultEl.hidden = true;\n      return;\n    }\n    if (!Number.isFinite(exercise) || exercise < 0){\n      setError(\"Please enter valid exercise minutes.\");\n      resultEl.hidden = true;\n      return;\n    }\n    if (!Number.isFinite(caffeine) || caffeine < 0){\n      setError(\"Please enter a valid number of caffeinated drinks.\");\n      resultEl.hidden = true;\n      return;\n    }\n\n    \/\/ Base bodyweight formula: ~35 ml\/kg\/day\n    let liters = weight * 0.035;\n\n    if (activityEl.value === \"moderate\") liters += 0.3;\n    if (activityEl.value === \"high\") liters += 0.6;\n\n    liters += (exercise \/ 30) * 0.35;\n\n    if (climateEl.value === \"warm\") liters += 0.3;\n    if (climateEl.value === \"hot\") liters += 0.7;\n\n    if (caffeine >= 3) liters += 0.2;\n    if (caffeine >= 5) liters += 0.2;\n\n    if (foodEl.value === \"medium\") liters -= 0.15;\n    if (foodEl.value === \"high\") liters -= 0.3;\n\n    liters = Math.max(1.2, liters);\n\n    const low = Math.max(1.0, liters - 0.3);\n    const high = liters + 0.3;\n    const cups250 = Math.round((liters * 1000) \/ 250);\n    const bottles500 = Math.round((liters * 1000) \/ 500);\n\n    let note = \"\";\n    if (liters < 2){\n      note = \"This is a modest hydration target that may fit smaller body size, cooler weather, or low activity.\";\n    } else if (liters < 3){\n      note = \"This is a common daily target for many adults under normal conditions.\";\n    } else {\n      note = \"This is a higher hydration target, often seen with bigger body size, heat, or more activity.\";\n    }\n\n    targetEl.textContent = `${liters.toFixed(1)} L\/day`;\n    rangeEl.textContent = `Practical range: ${low.toFixed(1)}\u2013${high.toFixed(1)} L\/day`;\n    servingsEl.textContent = `${cups250} cups or ${bottles500} \u00d7 500 ml`;\n    subEl.textContent = \"Spread fluids across the day rather than drinking everything at once.\";\n    noteEl.textContent = note;\n\n    resultEl.hidden = false;\n  }\n\n  function reset(){\n    setError(\"\");\n    weightEl.value = \"70\";\n    activityEl.value = \"low\";\n    climateEl.value = \"cool\";\n    exerciseEl.value = \"30\";\n    caffeineEl.value = \"2\";\n    foodEl.value = \"low\";\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>Water Intake Calculator Estimate a practical daily water intake target based on body weight, activity, climate, and caffeine intake. Body weight (kg) Used as the base for your daily water&hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":2457,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"_links":{"self":[{"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages\/2647"}],"collection":[{"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/bio-me.bio\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2647"}],"version-history":[{"count":1,"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages\/2647\/revisions"}],"predecessor-version":[{"id":2648,"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages\/2647\/revisions\/2648"}],"up":[{"embeddable":true,"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages\/2457"}],"wp:attachment":[{"href":"https:\/\/bio-me.bio\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2647"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}