{"id":65886,"date":"2026-10-14T12:15:16","date_gmt":"2026-10-14T06:45:16","guid":{"rendered":"https:\/\/www.quickonlinetips.com\/archives\/?page_id=65886"},"modified":"2026-10-15T10:47:58","modified_gmt":"2026-10-15T05:17:58","slug":"water-intake-calculator","status":"publish","type":"page","link":"https:\/\/www.quickonlinetips.com\/archives\/tools\/water-intake-calculator\/","title":{"rendered":"Water Intake Calculator: How Much Water Should I Drink?"},"content":{"rendered":"<p>This <strong>water intake calculator<\/strong> estimates how much water you should drink each day from your body weight, how much you exercise and how hot it is where you live. 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.qt-sel{background:#BEE3F8;border-color:#3182CE} .qt-tool .qt-bad{background:#FED7D7;border-color:#E53E3E} .qt-tool select{-webkit-appearance:none;-moz-appearance:none;appearance:none;padding-right:40px;cursor:pointer;border:2px solid #90B4DA;font-weight:600;background-color:#fff;background-image:url(\"data:image\/svg+xml,%3Csvg xmlns='http:\/\/www.w3.org\/2000\/svg' viewBox='0 0 14 9'%3E%3Cpath d='M1.5 1.5l5.5 5.5 5.5-5.5' fill='none' stroke='%232B6CB0' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'\/%3E%3C\/svg%3E\");background-repeat:no-repeat;background-position:right 14px center;background-size:14px 9px} .qt-tool select:hover{border-color:var(--qt-accent);background-color:#F4F8FD} .qt-tool select::-ms-expand{display:none} .qt-next{margin:0 0 1.75em} .qt-next .qt-next-h{font-size:14px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;color:#4A5568;margin:0 0 8px} .qt-next-g{display:grid;grid-template-columns:repeat(3,1fr);gap:8px} .qt-next-g a{display:flex;align-items:center;min-height:46px;padding:9px 12px;border:1px solid #AEC3DB;border-radius:8px;background:#F4F8FD;color:#215387;font-weight:600;font-size:15px;line-height:1.3;text-decoration:none} .qt-next-g a:hover,.qt-next-g a:focus{background:#E3EEFF;border-color:#2B6CB0;text-decoration:none} @media (max-width:600px){.qt-next-g{grid-template-columns:repeat(2,1fr)}}<\/style>\n<div class=\"qt-tool\" id=\"qt-wi\">\n<div class=\"qt-grid\">\n<div class=\"qt-field\"><label for=\"qt-wi-u\">Units<\/label><select id=\"qt-wi-u\"><option value=\"m\" selected>Metric (cm, kg)<\/option><option value=\"i\">US (ft, in, lb)<\/option><\/select><\/div>\n<div class=\"qt-field\" data-qt-u=\"qt-wi\" data-qt-sys=\"m\"><label for=\"qt-wi-kg\">Weight (kg)<\/label><input type=\"number\" step=\"any\" min=\"0\" id=\"qt-wi-kg\" value=\"70\"><\/div>\n<div class=\"qt-field\" data-qt-u=\"qt-wi\" data-qt-sys=\"i\"><label for=\"qt-wi-lb\">Weight (lb)<\/label><input type=\"number\" step=\"any\" min=\"0\" id=\"qt-wi-lb\" value=\"154\"><\/div>\n<div class=\"qt-field\"><label for=\"qt-wi-ex\">Exercise (minutes a day)<\/label><input type=\"number\" id=\"qt-wi-ex\" value=\"30\" min=\"0\" max=\"600\"><\/div>\n<div class=\"qt-field\"><label for=\"qt-wi-cl\">Climate<\/label><select id=\"qt-wi-cl\"><option value=\"0\" selected>Mild<\/option><option value=\"500\">Hot or humid<\/option><option value=\"250\">High altitude or very dry<\/option><\/select><\/div>\n<div class=\"qt-field\"><label for=\"qt-wi-awake\">Hours awake<\/label><input type=\"number\" id=\"qt-wi-awake\" value=\"16\" min=\"6\" max=\"22\"><\/div>\n<\/div>\n<div class=\"qt-result qt-roman\" id=\"qt-wi-out\" aria-live=\"polite\" style=\"font-size:30px\"><\/div>\n<div class=\"qt-stats\">\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-wi-oz\">&#8211;<\/span><span class=\"qt-lab\">US fl oz<\/span><\/div>\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-wi-cup\">&#8211;<\/span><span class=\"qt-lab\">Cups (240 ml)<\/span><\/div>\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-wi-gl\">&#8211;<\/span><span class=\"qt-lab\">Glasses (250 ml)<\/span><\/div>\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-wi-hr\">&#8211;<\/span><span class=\"qt-lab\">ml per waking hour<\/span><\/div>\n<\/div>\n<div class=\"qt-status\" id=\"qt-wi-status\" aria-live=\"polite\"><\/div>\n<p class=\"qt-note\">Everything runs in your browser. Nothing you enter is sent to or stored on our server.<\/p>\n<\/div>\n<p><script>(function () { function qtReady(fn) { if (document.readyState === 'loading') { document.addEventListener('DOMContentLoaded', fn); } else { fn(); } } function qtCopy(text, statusEl, okMsg) { function done(ok) { if (statusEl) { statusEl.textContent = ok ? (okMsg || 'Copied to clipboard.') : 'Press Ctrl+C (or Cmd+C) to copy.'; } } function fallback() { var ta = document.createElement('textarea'); ta.value = text; ta.setAttribute('readonly', ''); ta.style.position = 'fixed'; ta.style.top = '-1000px'; document.body.appendChild(ta); ta.select(); var ok = false; try { ok = document.execCommand('copy'); } catch (e) { ok = false; } document.body.removeChild(ta); done(ok); } if (navigator.clipboard) { if (window.isSecureContext) { navigator.clipboard.writeText(text).then(function () { done(true); }, fallback); return; } } fallback(); } function qtRand32() { var c = window.crypto || window.msCrypto; if (c) { if (c.getRandomValues) { var a = new Uint32Array(1); c.getRandomValues(a); return a[0]; } } return Math.floor(Math.random() * 4294967296); } function qtRandInt(range) { if (range === 4294967296) { return qtRand32(); } var limit = Math.floor(4294967296 \/ range) * range; var x = qtRand32(); while (x >= limit) { x = qtRand32(); } return x % range; } function qtBody(pre, cb) { function g(id) { return document.getElementById(pre + '-' + id); } function n(id) { var e = g(id); return e ? (parseFloat(e.value) || 0) : 0; } var u = g('u'); function show() { var us = u.value === 'i'; Array.prototype.forEach.call(document.querySelectorAll('[data-qt-u=\"' + pre + '\"]'), function (e) { e.style.display = (e.getAttribute('data-qt-sys') === 'i') === us ? '' : 'none'; }); Array.prototype.forEach.call(document.querySelectorAll('[data-qt-unit=\"' + pre + '\"]'), function (e) { e.textContent = us ? 'in' : 'cm'; }); } try { if ((navigator.language || '') === 'en-US') { u.value = 'i'; } } catch (e) { } u.addEventListener('change', function () { show(); cb(); }); show(); return { us: function () { return u.value === 'i'; }, cm: function () { return u.value === 'i' ? (n('ft') * 12 + n('in')) * 2.54 : n('cm'); }, kg: function () { return u.value === 'i' ? n('lb') * 0.45359237 : n('kg'); }, len: function (id) { return u.value === 'i' ? n(id) * 2.54 : n(id); } }; } function qtKgLb(kg) { return kg.toFixed(1) + ' kg (' + (kg \/ 0.45359237).toFixed(0) + ' lb)'; } qtReady(function () { var ex = document.getElementById('qt-wi-ex'); if (!ex) { return; } function $(id) { return document.getElementById(id); } var B = qtBody('qt-wi', upd); function upd() { var kg = B.kg(), mins = Math.max(0, parseFloat(ex.value) || 0), cl = parseFloat($('qt-wi-cl').value) || 0, aw = parseFloat($('qt-wi-awake').value) || 16; var st = $('qt-wi-status'); st.classList.remove('qt-error'); if (20 > kg || kg > 350) { $('qt-wi-out').textContent = '-'; st.textContent = 'Enter your weight.'; st.classList.add('qt-error'); return; } var ml = kg * 33 + mins \/ 30 * 350 + cl; ml = Math.round(ml \/ 50) * 50; $('qt-wi-out').textContent = (ml \/ 1000).toFixed(1) + ' liters a day'; $('qt-wi-oz').textContent = Math.round(ml \/ 29.5735); $('qt-wi-cup').textContent = (ml \/ 240).toFixed(1).replace(\/\\.0$\/, ''); $('qt-wi-gl').textContent = Math.round(ml \/ 250); $('qt-wi-hr').textContent = Math.round(ml \/ Math.max(aw, 6)); st.textContent = 'This includes about 20% that usually comes from food, so drinks alone can be a little less. Your thirst and pale yellow urine are the best day-to-day guide.'; } ['qt-wi-ex', 'qt-wi-awake', 'qt-wi-kg', 'qt-wi-lb'].forEach(function (id) { $(id).addEventListener('input', upd); }); $('qt-wi-cl').addEventListener('change', upd); upd(); }); })();<\/script><\/p>\n<div class=\"qt-next\">\n<p class=\"qt-next-h\">Try another free tool<\/p>\n<div class=\"qt-next-g\"><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/calorie-calculator\/\">Calorie Calculator<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/due-date-calculator\/\">Pregnancy Due Date Calculator<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/body-fat-calculator\/\">Body Fat Calculator<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/ideal-weight-calculator\/\">Ideal Weight Calculator<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/days-between-dates\/\">Days Between Dates<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/age-calculator\/\">Age Calculator<\/a><\/div>\n<\/div>\n<p><strong>Quick answer:<\/strong> A common guide is about 30 to 35 ml of water per kilogram of body weight (roughly half an ounce per pound), plus about 350 ml (12 oz) for every 30 minutes of exercise. For a 70 kg (154 lb) adult that is around 2.3 liters, or about 10 cups, before exercise.<\/p>\n<h2>How to use the water intake calculator<\/h2>\n<ol>\n<li>Enter your weight in kilograms or pounds.<\/li>\n<li>Add how many minutes you exercise on a typical day.<\/li>\n<li>Choose your climate. Heat, humidity, altitude and dry air all raise your needs.<\/li>\n<li>Read your daily total in liters, ounces, cups and glasses, and how much to sip each waking hour.<\/li>\n<\/ol>\n<h2>How much water do adults need?<\/h2>\n<p>The US National Academies suggest a total daily fluid intake of about <strong>3.7 liters for men<\/strong> and <strong>2.7 liters for women<\/strong>, counting water from all drinks and food. About 20 percent normally comes from food such as fruit, vegetables and soup, which leaves roughly 3 liters (13 cups) of drinks for men and 2.2 liters (9 cups) for women. The old &#8220;8 glasses a day&#8221; rule is a reasonable, easy-to-remember minimum.<\/p>\n<h2>When you need more water<\/h2>\n<ul>\n<li><strong>Exercise:<\/strong> drink before, during and after. Long or intense sessions may also need electrolytes.<\/li>\n<li><strong>Hot weather or saunas:<\/strong> sweating can lose a liter or more an hour.<\/li>\n<li><strong>Pregnancy and breastfeeding:<\/strong> about 300 ml and 700 ml extra a day.<\/li>\n<li><strong>Illness:<\/strong> fever, vomiting and diarrhea all increase fluid loss.<\/li>\n<\/ul>\n<h2>Signs of dehydration<\/h2>\n<p>Thirst, dark yellow urine, headache, tiredness and dizziness are early signs. Pale straw-colored urine usually means you are drinking enough. Drinking far more than you need in a short time can also be harmful, so spread water across the day rather than drinking large amounts at once.<\/p>\n<p>If you have kidney, heart or liver disease, or take medicine that affects fluid balance, follow your doctor&#8217;s advice on how much to drink; this calculator is general information only. Related health tools: the <a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/calorie-calculator\/\">calorie calculator<\/a>, <a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/bmi-calculator\/\">BMI calculator<\/a> and <a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/sleep-calculator\/\">sleep calculator<\/a>.<\/p>\n<h2>FAQ<\/h2>\n<h3>Do tea and coffee count?<\/h3>\n<p>Yes. Moderate amounts of tea and coffee count toward your fluid intake, although water is the best everyday choice.<\/p>\n<h3>How many ounces of water should I drink?<\/h3>\n<p>Half your body weight in pounds, in ounces, is a quick rule. A 160 lb person would aim for about 80 oz a day.<\/p>\n<h2>More free tools<\/h2>\n<div class=\"qt-cards\"><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/calorie-calculator\/\"><strong>Calorie Calculator<\/strong><span>Daily calories (TDEE) and BMR for your goal.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/due-date-calculator\/\"><strong>Pregnancy Due Date Calculator<\/strong><span>Estimate a due date and weeks pregnant.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/body-fat-calculator\/\"><strong>Body Fat Calculator<\/strong><span>Body fat percentage by the US Navy method.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/ideal-weight-calculator\/\"><strong>Ideal Weight Calculator<\/strong><span>Ideal body weight by height with four formulas.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/days-between-dates\/\"><strong>Days Between Dates<\/strong><span>Count days, weeks and business days between two dates.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/age-calculator\/\"><strong>Age Calculator<\/strong><span>Your exact age in years, months and days, plus next birthday.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/percentage-calculator\/\"><strong>Percentage Calculator<\/strong><span>Work out X% of Y, percent change and more.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/online-stopwatch\/\"><strong>Stopwatch and Timer<\/strong><span>Online stopwatch with laps and a countdown timer with alarm.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/average-calculator\/\"><strong>Average Calculator<\/strong><span>Mean, median, mode and range of a list of numbers.<\/span><\/a><\/div>\n<p>See all of them on the <a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/\">QuickOnlineTips free online tools<\/a> page and play our <a href=\"https:\/\/www.quickonlinetips.com\/archives\/games\/\">free online games<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This water intake calculator estimates how much water you should drink each day from your body weight, how much you exercise and how hot it is where you live. See the answer in liters, ounces, cups and glasses, and spread it across your waking hours. UnitsMetric (cm, kg)US (ft, in, lb) Weight (kg) Weight (lb)&#8230;<\/p>\n","protected":false},"author":4,"featured_media":66590,"parent":65595,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"class_list":["post-65886","page","type-page","status-publish","has-post-thumbnail","hentry"],"_links":{"self":[{"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/65886","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/comments?post=65886"}],"version-history":[{"count":3,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/65886\/revisions"}],"predecessor-version":[{"id":66438,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/65886\/revisions\/66438"}],"up":[{"embeddable":true,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/65595"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/media\/66590"}],"wp:attachment":[{"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/media?parent=65886"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}