{"id":2589,"date":"2026-03-05T00:15:12","date_gmt":"2026-03-04T22:15:12","guid":{"rendered":"https:\/\/bio-me.bio\/?page_id=2589"},"modified":"2026-03-06T19:45:44","modified_gmt":"2026-03-06T17:45:44","slug":"caffeine-intake-calculator","status":"publish","type":"page","link":"https:\/\/bio-me.bio\/?page_id=2589","title":{"rendered":"Caffeine Intake Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"eco-tool-caffeine-a17d2\">\n  <div class=\"eco-tool__header\">\n    <h2 class=\"eco-tool__title\">Caffeine Intake Calculator<\/h2>\n    <p class=\"eco-tool__lead\">\n      Estimate your daily caffeine intake based on common drinks. Results are informational only \u2014 individual sensitivity varies.\n    <\/p>\n  <\/div>\n\n  <form class=\"eco-tool__form\" id=\"eco-caf-form-a17d2\" novalidate>\n    <div class=\"eco-tool__grid3\">\n      <!-- Body weight -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-caf-weight-a17d2\">Body weight (kg)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-caf-weight-a17d2\" type=\"number\" min=\"20\" step=\"1\" value=\"70\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">Used to show mg\/kg (tolerance varies).<\/div>\n      <\/div>\n\n      <!-- Coffee -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-caf-coffee-a17d2\">Coffee (cups\/day)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-caf-coffee-a17d2\" type=\"number\" min=\"0\" step=\"1\" value=\"2\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">Default: ~95 mg per cup.<\/div>\n      <\/div>\n\n      <!-- Coffee strength -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-caf-coffee-mg-a17d2\">Coffee strength (mg\/cup)<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-caf-coffee-mg-a17d2\">\n          <option value=\"95\" selected>Regular brewed (~95 mg)<\/option>\n          <option value=\"63\">Instant (~63 mg)<\/option>\n          <option value=\"150\">Strong \/ large (~150 mg)<\/option>\n          <option value=\"0\">Custom\u2026<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Choose a preset or set custom below.<\/div>\n      <\/div>\n\n      <!-- Custom coffee mg -->\n      <div class=\"eco-tool__field eco-tool__hidden\" id=\"eco-caf-coffee-custom-wrap-a17d2\">\n        <label class=\"eco-tool__label\" for=\"eco-caf-coffee-custom-a17d2\">Custom coffee (mg\/cup)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-caf-coffee-custom-a17d2\" type=\"number\" min=\"0\" step=\"1\" value=\"120\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">Example: 120 mg.<\/div>\n      <\/div>\n\n      <!-- Tea -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-caf-tea-a17d2\">Tea (cups\/day)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-caf-tea-a17d2\" type=\"number\" min=\"0\" step=\"1\" value=\"0\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">Default: ~35 mg per cup.<\/div>\n      <\/div>\n\n      <!-- Tea mg -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-caf-tea-mg-a17d2\">Tea strength (mg\/cup)<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-caf-tea-mg-a17d2\">\n          <option value=\"35\" selected>Black\/green tea (~35 mg)<\/option>\n          <option value=\"20\">Light tea (~20 mg)<\/option>\n          <option value=\"50\">Strong tea (~50 mg)<\/option>\n          <option value=\"0\">Custom\u2026<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Choose a preset or set custom below.<\/div>\n      <\/div>\n\n      <!-- Custom tea mg -->\n      <div class=\"eco-tool__field eco-tool__hidden\" id=\"eco-caf-tea-custom-wrap-a17d2\">\n        <label class=\"eco-tool__label\" for=\"eco-caf-tea-custom-a17d2\">Custom tea (mg\/cup)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-caf-tea-custom-a17d2\" type=\"number\" min=\"0\" step=\"1\" value=\"35\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">Example: 35 mg.<\/div>\n      <\/div>\n\n      <!-- Energy drinks -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-caf-energy-a17d2\">Energy drinks (cans\/day)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-caf-energy-a17d2\" type=\"number\" min=\"0\" step=\"1\" value=\"0\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">Default: ~80 mg per can.<\/div>\n      <\/div>\n\n      <!-- Energy mg -->\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-caf-energy-mg-a17d2\">Energy drink (mg\/can)<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-caf-energy-mg-a17d2\">\n          <option value=\"80\" selected>Typical (~80 mg)<\/option>\n          <option value=\"120\">Strong (~120 mg)<\/option>\n          <option value=\"160\">Very strong (~160 mg)<\/option>\n          <option value=\"0\">Custom\u2026<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Choose a preset or set custom below.<\/div>\n      <\/div>\n\n      <!-- Custom energy mg -->\n      <div class=\"eco-tool__field eco-tool__hidden\" id=\"eco-caf-energy-custom-wrap-a17d2\">\n        <label class=\"eco-tool__label\" for=\"eco-caf-energy-custom-a17d2\">Custom energy drink (mg\/can)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-caf-energy-custom-a17d2\" type=\"number\" min=\"0\" step=\"1\" value=\"80\" inputmode=\"numeric\" \/>\n        <div class=\"eco-tool__hint\">Example: 80 mg.<\/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-caf-calc-a17d2\">Calculate<\/button>\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\" id=\"eco-caf-reset-a17d2\">Reset<\/button>\n      <div class=\"eco-tool__error\" id=\"eco-caf-error-a17d2\" aria-live=\"polite\"><\/div>\n    <\/div>\n  <\/form>\n\n  <div class=\"eco-tool__result\" id=\"eco-caf-result-a17d2\" 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 caffeine<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-caf-total-a17d2\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-caf-sources-a17d2\"><\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Relative load<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-caf-mgkg-a17d2\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-caf-band-a17d2\"><\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__card eco-tool__card--wide\">\n      <div class=\"eco-tool__metric-label\">Quick interpretation<\/div>\n      <div class=\"eco-tool__metric-sub\" id=\"eco-caf-note-a17d2\"><\/div>\n    <\/div>\n\n    <p class=\"eco-tool__note\">\n      This calculator is not medical advice. If you have a health condition, are sensitive to caffeine, or take medications, consult a qualified professional.\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 multiply servings by mg per serving and sum them. We also compute mg\/kg using your body weight.\n      <\/p>\n      <ul class=\"eco-tool__list\" id=\"eco-caf-factors-a17d2\"><\/ul>\n    <\/div>\n  <\/details>\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{ 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{\n  display: grid;\n  grid-template-columns: 1fr;\n  gap: 16px;\n}\n@media (min-width: 860px){\n  .eco-tool__grid3{ grid-template-columns: 1fr 1fr 1fr; }\n}\n\n.eco-tool__field{\n  display: flex;\n  flex-direction: column;\n  gap: 6px;\n}\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\n\/* select aligned + arrow *\/\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\/* equal hint height for symmetry *\/\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{ padding: 10px 22px; 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opacity: .9; }\n\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\n.eco-tool__hidden{ display: none !important; }\n<\/style>\n\n<script>\n(function(){\n  const S = \"a17d2\";\n  const el = (id) => document.getElementById(id + \"-\" + S);\n\n  const weightEl = el(\"eco-caf-weight\");\n\n  const coffeeEl = el(\"eco-caf-coffee\");\n  const coffeeMgEl = el(\"eco-caf-coffee-mg\");\n  const coffeeCustomWrap = el(\"eco-caf-coffee-custom-wrap\");\n  const coffeeCustomEl = el(\"eco-caf-coffee-custom\");\n\n  const teaEl = el(\"eco-caf-tea\");\n  const teaMgEl = el(\"eco-caf-tea-mg\");\n  const teaCustomWrap = el(\"eco-caf-tea-custom-wrap\");\n  const teaCustomEl = el(\"eco-caf-tea-custom\");\n\n  const energyEl = el(\"eco-caf-energy\");\n  const energyMgEl = el(\"eco-caf-energy-mg\");\n  const energyCustomWrap = el(\"eco-caf-energy-custom-wrap\");\n  const energyCustomEl = el(\"eco-caf-energy-custom\");\n\n  const calcBtn = el(\"eco-caf-calc\");\n  const resetBtn = el(\"eco-caf-reset\");\n  const errorEl = el(\"eco-caf-error\");\n\n  const resultEl = el(\"eco-caf-result\");\n  const totalEl = el(\"eco-caf-total\");\n  const mgkgEl = el(\"eco-caf-mgkg\");\n  const bandEl = el(\"eco-caf-band\");\n  const noteEl = el(\"eco-caf-note\");\n  const sourcesEl = el(\"eco-caf-sources\");\n  const factorsEl = el(\"eco-caf-factors\");\n\n  function setError(msg){ errorEl.textContent = msg || \"\"; }\n\n  function showCustom(selectEl, wrapEl){\n    wrapEl.classList.toggle(\"eco-tool__hidden\", selectEl.value !== \"0\");\n  }\n\n  function getMg(selectEl, customEl){\n    const v = Number(selectEl.value);\n    if (v === 0) return Number(customEl.value);\n    return v;\n  }\n\n  function fmt(n){\n    return Math.round(n).toLocaleString();\n  }\n\n  function fillFactors(){\n    factorsEl.innerHTML = [\n      \"<li><strong>Formula:<\/strong> servings \u00d7 mg per serving<\/li>\",\n      \"<li><strong>mg\/kg:<\/strong> total mg \u00f7 body weight (kg)<\/li>\",\n      \"<li><strong>Presets:<\/strong> Coffee 95 mg\/cup, Tea 35 mg\/cup, Energy drink 80 mg\/can (editable)<\/li>\"\n    ].join(\"\");\n  }\n\n  function interpret(totalMg, mgkg){\n    \/\/ Informational bands (not medical advice)\n    if (totalMg === 0) return \"No caffeine entered. If you consume caffeine, track it over a full day for better accuracy.\";\n    if (totalMg < 100) return \"Low intake. Many people feel minimal effects at this level.\";\n    if (totalMg < 300) return \"Moderate intake. Sensitivity varies; consider timing if sleep is affected.\";\n    if (totalMg < 400) return \"Higher intake. Some people may notice jitteriness or sleep disruption, especially later in the day.\";\n    return \"Very high intake. 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Results are informational only \u2014 individual sensitivity varies. Body weight (kg) Used to show mg\/kg (tolerance varies). Coffee&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:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages\/2589"}],"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=2589"}],"version-history":[{"count":1,"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages\/2589\/revisions"}],"predecessor-version":[{"id":2590,"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages\/2589\/revisions\/2590"}],"up":[{"embeddable":true,"href":"https:\/\/bio-me.bio\/index.php?rest_route=\/wp\/v2\/pages\/2452"}],"wp:attachment":[{"href":"https:\/\/bio-me.bio\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2589"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}