{"id":2792,"date":"2026-03-24T23:08:21","date_gmt":"2026-03-24T21:08:21","guid":{"rendered":"https:\/\/bio-me.bio\/?page_id=2792"},"modified":"2026-03-24T23:08:22","modified_gmt":"2026-03-24T21:08:22","slug":"hydration-needs-calculator","status":"publish","type":"page","link":"https:\/\/bio-me.bio\/?page_id=2792","title":{"rendered":"Hydration Needs Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"eco-tool-hydration-7d3e6\">\n  <div class=\"eco-tool__header\">\n    <h2 class=\"eco-tool__title\">Hydration Needs Calculator<\/h2>\n    <p class=\"eco-tool__lead\">\n      Estimate a practical daily fluid target based on body weight, temperature, activity level, and exercise duration.\n    <\/p>\n  <\/div>\n\n  <form class=\"eco-tool__form\" id=\"eco-hydration-form-7d3e6\" novalidate>\n    <div class=\"eco-tool__grid3\">\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-hydration-weight-7d3e6\">Body weight (kg)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-hydration-weight-7d3e6\" type=\"number\" min=\"10\" max=\"300\" step=\"0.1\" value=\"70\" inputmode=\"decimal\" \/>\n        <div class=\"eco-tool__hint\">Used as the base for your daily fluid estimate.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-hydration-temp-7d3e6\">Weather \/ temperature<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-hydration-temp-7d3e6\">\n          <option value=\"cool\">Cool<\/option>\n          <option value=\"mild\" selected>Mild<\/option>\n          <option value=\"warm\">Warm<\/option>\n          <option value=\"hot\">Hot<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Warmer weather usually increases fluid needs.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-hydration-activity-7d3e6\">Daily activity level<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-hydration-activity-7d3e6\">\n          <option value=\"low\" selected>Low activity<\/option>\n          <option value=\"moderate\">Moderately active<\/option>\n          <option value=\"high\">Very active<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">More movement usually means more fluid loss.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-hydration-exercise-7d3e6\">Exercise time (minutes)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-hydration-exercise-7d3e6\" type=\"number\" min=\"0\" max=\"600\" step=\"5\" value=\"30\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">Extra exercise adds extra fluid need.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-hydration-sweat-7d3e6\">Sweat level<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-hydration-sweat-7d3e6\">\n          <option value=\"light\" selected>Light<\/option>\n          <option value=\"moderate\">Moderate<\/option>\n          <option value=\"heavy\">Heavy<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">People who sweat more often need more fluids.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-hydration-display-7d3e6\">Display style<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-hydration-display-7d3e6\">\n          <option value=\"liters\" selected>Liters only<\/option>\n          <option value=\"both\">Liters + mL per hour<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Choose a simple or more detailed result.<\/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-hydration-calc-7d3e6\">Calculate<\/button>\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\" id=\"eco-hydration-reset-7d3e6\">Reset<\/button>\n      <div class=\"eco-tool__error\" id=\"eco-hydration-error-7d3e6\" aria-live=\"polite\"><\/div>\n    <\/div>\n  <\/form>\n\n  <div class=\"eco-tool__result\" id=\"eco-hydration-result-7d3e6\" 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 fluid intake<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-hydration-value-7d3e6\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-hydration-sub-7d3e6\"><\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Extra exercise fluids<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-hydration-extra-7d3e6\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-hydration-extrasub-7d3e6\"><\/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-hydration-note-7d3e6\"><\/div>\n    <\/div>\n\n    <p class=\"eco-tool__note\">\n      This is a practical estimate, not medical advice. Real hydration needs vary with food intake, health status, altitude, sweat losses, and individual physiology.\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 body-weight fluid estimate, then add extra fluid based on temperature, activity level, sweat rate, and exercise duration.\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.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__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=\"7d3e6\";\n  const el=(id)=>document.getElementById(id+\"-\"+S);\n\n  const weightEl=el(\"eco-hydration-weight\");\n  const tempEl=el(\"eco-hydration-temp\");\n  const activityEl=el(\"eco-hydration-activity\");\n  const exerciseEl=el(\"eco-hydration-exercise\");\n  const sweatEl=el(\"eco-hydration-sweat\");\n  const displayEl=el(\"eco-hydration-display\");\n\n  const resultEl=el(\"eco-hydration-result\");\n  const valueEl=el(\"eco-hydration-value\");\n  const subEl=el(\"eco-hydration-sub\");\n  const extraEl=el(\"eco-hydration-extra\");\n  const extraSubEl=el(\"eco-hydration-extrasub\");\n  const noteEl=el(\"eco-hydration-note\");\n  const errorEl=el(\"eco-hydration-error\");\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\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 a valid exercise duration.\");\n      resultEl.hidden = true;\n      return;\n    }\n\n    let liters = weight * 0.035;\n    let extraExercise = 0;\n\n    if(tempEl.value === \"warm\") liters += 0.4;\n    if(tempEl.value === \"hot\") liters += 0.8;\n    if(tempEl.value === \"cool\") liters -= 0.1;\n\n    if(activityEl.value === \"moderate\") liters += 0.4;\n    if(activityEl.value === \"high\") liters += 0.8;\n\n    extraExercise = (exercise \/ 60) * 0.5;\n\n    if(sweatEl.value === \"moderate\") extraExercise += (exercise \/ 60) * 0.25;\n    if(sweatEl.value === \"heavy\") extraExercise += (exercise \/ 60) * 0.5;\n\n    const total = liters + extraExercise;\n\n    valueEl.textContent = `${total.toFixed(1)} L\/day`;\n    subEl.textContent = displayEl.value === \"both\"\n      ? `About ${(total * 1000 \/ 16).toFixed(0)} mL per waking hour if spread evenly.`\n      : `Estimated from body size, weather, activity, sweat rate, and exercise.`;\n\n    extraEl.textContent = `${extraExercise.toFixed(1)} L`;\n    extraSubEl.textContent = `Estimated extra fluid linked to exercise and sweat losses.`;\n\n    let note = \"This is a practical daily fluid target rather than an exact requirement. \";\n    if(tempEl.value === \"hot\"){\n      note += \" Hot conditions can raise fluid needs quickly, especially during prolonged activity. \";\n    } else if(activityEl.value === \"high\"){\n      note += \" High activity often means more fluid loss even outside formal exercise. \";\n    } else {\n      note += \" Daily needs can still change depending on food, climate, and sweat response. \";\n    }\n\n    note += \" A good hydration plan is usually easier when fluids are spread across the day instead of consumed all at once.\";\n\n    noteEl.textContent = note;\n    resultEl.hidden = false;\n  }\n\n  function reset(){\n    setError(\"\");\n    weightEl.value = \"70\";\n    tempEl.value = \"mild\";\n    activityEl.value = \"low\";\n    exerciseEl.value = \"30\";\n    sweatEl.value = \"light\";\n    displayEl.value = \"liters\";\n    resultEl.hidden = true;\n  }\n\n  el(\"eco-hydration-calc\").addEventListener(\"click\", calculate);\n  el(\"eco-hydration-reset\").addEventListener(\"click\", reset);\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Hydration Needs Calculator Estimate a practical daily fluid target based on body weight, temperature, activity level, and exercise duration. Body weight (kg) Used as the base for your daily fluid&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\/2792"}],"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=2792"}],"version-history":[{"count":1,"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages\/2792\/revisions"}],"predecessor-version":[{"id":2793,"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages\/2792\/revisions\/2793"}],"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=2792"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}