{"id":65660,"date":"2026-10-14T09:57:35","date_gmt":"2026-10-14T04:27:35","guid":{"rendered":"https:\/\/www.quickonlinetips.com\/archives\/?page_id=65660"},"modified":"2026-10-14T14:32:07","modified_gmt":"2026-10-14T09:02:07","slug":"age-calculator","status":"publish","type":"page","link":"https:\/\/www.quickonlinetips.com\/archives\/tools\/age-calculator\/","title":{"rendered":"Age Calculator: How Old Am I in Years, Months and Days?"},"content":{"rendered":"<p>Enter a date of birth and this <strong>age calculator<\/strong> shows the exact age in years, months and days. 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.qt-shake{animation:qt-shake .7s} @keyframes qt-shake{0%,100%{transform:translate(0)}20%{transform:translate(-12px,4px) rotate(-6deg)}40%{transform:translate(10px,-6px) rotate(5deg)}60%{transform:translate(-8px,6px) rotate(-4deg)}80%{transform:translate(6px,-3px) rotate(3deg)}} .qt-tool .qt-grid>.qt-field{display:flex;flex-direction:column;justify-content:flex-end} .qt-tool .qt-field input[type=range]{height:46px;padding:0 10px} .qt-tool .qt-field input[type=color]{height:46px} .qt-tool .qt-drop .qt-sub{font-weight:400;font-size:14px;margin:4px 0 0} .qt-tool .qt-board{display:grid;gap:5px;margin:14px auto 0;max-width:100%;user-select:none;-webkit-user-select:none;touch-action:manipulation} .qt-tool .qt-cell{display:flex;align-items:center;justify-content:center;background:#fff;border:1px solid #AEC3DB;border-radius:6px;font-weight:700;cursor:pointer;aspect-ratio:1;font-size:clamp(14px,4vw,26px);color:#1A202C;padding:0;min-width:0;font-family:inherit;line-height:1} .qt-tool .qt-cell:disabled{cursor:default} .qt-tool .qt-win{background:#C6F6D5;border-color:#38A169} .qt-tool .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-ag\">\n<div class=\"qt-grid\">\n<div class=\"qt-field\"><label for=\"qt-ag-dob\">Date of birth<\/label><input type=\"date\" id=\"qt-ag-dob\" value=\"2000-01-01\"><\/div>\n<div class=\"qt-field\"><label for=\"qt-ag-on\">Age on this date<\/label><input type=\"date\" id=\"qt-ag-on\"><\/div>\n<\/div>\n<div class=\"qt-row\"><button type=\"button\" class=\"qt-btn qt-btn-ghost qt-btn-sm\" id=\"qt-ag-today\">Use today<\/button><\/div>\n<div class=\"qt-result qt-roman\" id=\"qt-ag-age\" aria-live=\"polite\"><\/div>\n<div class=\"qt-explain\" id=\"qt-ag-born\"><\/div>\n<div class=\"qt-stats\">\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-ag-months\">0<\/span><span class=\"qt-lab\">Total months<\/span><\/div>\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-ag-weeks\">0<\/span><span class=\"qt-lab\">Total weeks<\/span><\/div>\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-ag-days\">0<\/span><span class=\"qt-lab\">Total days<\/span><\/div>\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-ag-hours\">0<\/span><span class=\"qt-lab\">Total hours (approx.)<\/span><\/div>\n<\/div>\n<p class=\"qt-sub\">Next birthday<\/p>\n<div class=\"qt-stats\">\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-ag-left\">0<\/span><span class=\"qt-lab\">Days to go<\/span><\/div>\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-ag-turn\">0<\/span><span class=\"qt-lab\">Turning<\/span><\/div>\n<div class=\"qt-stat\"><span class=\"qt-num\" id=\"qt-ag-nextday\">&#8211;<\/span><span class=\"qt-lab\" id=\"qt-ag-nextdate\">Weekday<\/span><\/div>\n<\/div>\n<div class=\"qt-status\" id=\"qt-ag-status\" aria-live=\"polite\"><\/div>\n<p class=\"qt-note\">Everything runs in your browser. Your date of birth is never 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; } qtReady(function () { var dob = document.getElementById('qt-ag-dob'); if (!dob) { return; } var on = document.getElementById('qt-ag-on'); var DAY = 86400000; function $(id) { return document.getElementById(id); } function iso(d) { return d.toISOString().slice(0, 10); } function todayUTC() { var t = new Date(); return new Date(Date.UTC(t.getFullYear(), t.getMonth(), t.getDate())); } function parse(v) { var m = \/^(\\d{4})-(\\d{2})-(\\d{2})$\/.exec(v || ''); if (!m) { return null; } return new Date(Date.UTC(+m[1], +m[2] - 1, +m[3])); } function dim(y, m) { return new Date(Date.UTC(y, m + 1, 0)).getUTCDate(); } function num(x) { return x.toLocaleString(); } function plural(n, w) { return num(n) + ' ' + w + (n === 1 ? '' : 's'); } function bday(y, b) { var d = b.getUTCDate(); var m = b.getUTCMonth(); return new Date(Date.UTC(y, m, Math.min(d, dim(y, m)))); } function calc() { var b = parse(dob.value), t = parse(on.value), st = $('qt-ag-status'); st.textContent = ''; st.classList.remove('qt-error'); if (!b || !t) { $('qt-ag-age').textContent = 'Enter a date of birth'; return; } if (b > t) { $('qt-ag-age').textContent = 'Not born yet'; st.textContent = 'The date of birth is after the \"age on\" date.'; st.classList.add('qt-error'); ['qt-ag-born', 'qt-ag-months', 'qt-ag-weeks', 'qt-ag-days', 'qt-ag-hours', 'qt-ag-left', 'qt-ag-turn', 'qt-ag-nextday'].forEach(function (i) { $(i).textContent = '-'; }); return; } var y = t.getUTCFullYear() - b.getUTCFullYear(); var m = t.getUTCMonth() - b.getUTCMonth(); var d = t.getUTCDate() - b.getUTCDate(); if (0 > d) { m--; var pm = t.getUTCMonth() - 1, py = t.getUTCFullYear(); if (0 > pm) { pm = 11; py--; } d += dim(py, pm); } if (0 > m) { y--; m += 12; } $('qt-ag-age').textContent = plural(y, 'year') + ', ' + plural(m, 'month') + ', ' + plural(d, 'day'); var days = Math.round((t - b) \/ DAY); $('qt-ag-born').textContent = 'Born on a ' + b.toLocaleDateString(undefined, { weekday: 'long', timeZone: 'UTC' }) + ', ' + b.toLocaleDateString(undefined, { year: 'numeric', month: 'long', day: 'numeric', timeZone: 'UTC' }); $('qt-ag-months').textContent = num(y * 12 + m); $('qt-ag-weeks').textContent = num(Math.floor(days \/ 7)); $('qt-ag-days').textContent = num(days); $('qt-ag-hours').textContent = num(days * 24); var nb = bday(t.getUTCFullYear(), b); if (t > nb) { nb = bday(t.getUTCFullYear() + 1, b); } var left = Math.round((nb - t) \/ DAY); $('qt-ag-left').textContent = left === 0 ? 'Today!' : num(left); $('qt-ag-turn').textContent = nb.getUTCFullYear() - b.getUTCFullYear(); $('qt-ag-nextday').textContent = nb.toLocaleDateString(undefined, { weekday: 'short', timeZone: 'UTC' }); $('qt-ag-nextdate').textContent = nb.toLocaleDateString(undefined, { year: 'numeric', month: 'short', day: 'numeric', timeZone: 'UTC' }); if (left === 0) { st.textContent = 'Happy birthday!'; } if (b.getUTCMonth() === 1) { if (b.getUTCDate() === 29) { st.textContent = 'Leap-day birthday: in other years it is shown on 28 February.'; } } } on.value = iso(todayUTC()); [dob, on].forEach(function (el) { el.addEventListener('input', calc); el.addEventListener('change', calc); }); $('qt-ag-today').addEventListener('click', function () { on.value = iso(todayUTC()); calc(); }); calc(); }); })();<\/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\/days-between-dates\/\">Days Between Dates<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/percentage-calculator\/\">Percentage Calculator<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/online-stopwatch\/\">Stopwatch and Timer<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/average-calculator\/\">Average Calculator<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/fraction-calculator\/\">Fraction Calculator<\/a><a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/gpa-calculator\/\">GPA Calculator<\/a><\/div>\n<\/div>\n<p><strong>Quick answer:<\/strong> Enter the date of birth in the first box. The exact age appears instantly as years, months and days. To find someone&#8217;s age on a past or future date, change <strong>Age on this date<\/strong>.<\/p>\n<h2>How to use the age calculator<\/h2>\n<ol>\n<li>Type or pick the <strong>Date of birth<\/strong>. On phones, the date picker lets you choose the year first.<\/li>\n<li>Leave <strong>Age on this date<\/strong> as today, or change it to work out an age at a different time, such as on a school starting date or an exam deadline.<\/li>\n<li>Read the age, the totals and the countdown to the next birthday.<\/li>\n<\/ol>\n<h2>How age is calculated<\/h2>\n<p>Age is counted the way people normally say it. You become one year older on your birthday, and one month older on the same date each month. For example, someone born on 20 May 1990 is 36 years, 4 months and 23 days old on 13 October 2026. When the day of the month hasn&#8217;t come round yet, the calculator borrows the days from the previous month, so the result always matches a calendar count.<\/p>\n<p>Leap years are handled automatically. If you were born on 29 February, your age goes up on 28 February in years without a leap day. Some countries use 1 March for legal purposes instead, so check local rules for official documents.<\/p>\n<h2>What the totals mean<\/h2>\n<ul>\n<li><strong>Total months:<\/strong> complete months lived, useful for babies and toddlers, whose age is often given in months up to about 2 years.<\/li>\n<li><strong>Total weeks and days:<\/strong> the exact number of days since birth, a fun number for &#8220;10,000 days old&#8221; celebrations (that is about 27 years and 4 months).<\/li>\n<li><strong>Total hours:<\/strong> days times 24. It is approximate because it doesn&#8217;t know the time of birth.<\/li>\n<li><strong>Day of the week:<\/strong> the weekday of the birth date, such as &#8220;Born on a Saturday&#8221;.<\/li>\n<\/ul>\n<h2>Common reasons to calculate age<\/h2>\n<ul>\n<li>Checking age limits for school admission, sports categories, jobs, exams or retirement plans.<\/li>\n<li>Filling in forms that ask for age in completed years.<\/li>\n<li>Working out a baby&#8217;s age in weeks and months.<\/li>\n<li>Planning a milestone birthday and seeing what day of the week it falls on.<\/li>\n<\/ul>\n<p>To count days between any two dates, such as the days until an event, use our <a href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/days-between-dates\/\">days between dates calculator<\/a>.<\/p>\n<h2>How to calculate age in Excel<\/h2>\n<p>Put the date of birth in A1 and use <code>=DATEDIF(A1,TODAY(),\"Y\")<\/code> for full years. Add <code>\"YM\"<\/code> for the extra months and <code>\"MD\"<\/code> for the extra days. Google Sheets supports the same formula.<\/p>\n<h2>FAQ<\/h2>\n<h3>How old am I if I was born in 2000?<\/h3>\n<p>In 2026 you turn 26 on your birthday; before it you are 25. Enter your full date of birth for the exact answer.<\/p>\n<h3>Is my date of birth saved?<\/h3>\n<p>No. The age is calculated in your browser and nothing is sent to our server.<\/p>\n<h3>Can I calculate the age difference between two people?<\/h3>\n<p>Enter the older person&#8217;s birth date as the date of birth and the younger person&#8217;s as the &#8220;age on&#8221; date. The result is the gap between them.<\/p>\n<h3>Why is my age in days different on another site?<\/h3>\n<p>Some sites include the birth day itself, or use the time of birth. This calculator counts whole days from the birth date to the chosen date.<\/p>\n<h2>More free tools<\/h2>\n<div class=\"qt-cards\"><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\/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><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/fraction-calculator\/\"><strong>Fraction Calculator<\/strong><span>Add, subtract, multiply and divide fractions with steps.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/gpa-calculator\/\"><strong>GPA Calculator<\/strong><span>Semester and cumulative GPA on the 4.0 scale.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/tip-calculator\/\"><strong>Tip Calculator<\/strong><span>Work out the tip and split the bill between people.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/hours-calculator\/\"><strong>Hours Calculator<\/strong><span>Hours and minutes between two times, plus a time card.<\/span><\/a><a class=\"qt-card\" href=\"https:\/\/www.quickonlinetips.com\/archives\/tools\/bmi-calculator\/\"><strong>BMI Calculator<\/strong><span>Body mass index from height and weight, metric or US.<\/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>Enter a date of birth and this age calculator shows the exact age in years, months and days. It also counts the total months, weeks and days lived, tells you which day of the week you were born on, and how many days are left until the next birthday. Date of birth Age on this&#8230;<\/p>\n","protected":false},"author":4,"featured_media":0,"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-65660","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/65660","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=65660"}],"version-history":[{"count":3,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/65660\/revisions"}],"predecessor-version":[{"id":66497,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/65660\/revisions\/66497"}],"up":[{"embeddable":true,"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/pages\/65595"}],"wp:attachment":[{"href":"https:\/\/www.quickonlinetips.com\/archives\/wp-json\/wp\/v2\/media?parent=65660"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}