Age Calculator
Enter a date of birth and get the exact age in years, months and days, the total time lived, the next birthday and the zodiac sign.
Defaults to today. Set a past or future date to calculate an age at that moment.
About Age Calculator
The calculator does proper calendar arithmetic rather than dividing milliseconds by a year: it walks the years, months and days between the two dates so a birthday on 29 February is handled correctly in non-leap years. Alongside the headline age you get the totals in weeks, days, hours and minutes, which is usually the number people are actually curious about.
The countdown shows how long until the next birthday and which day of the week it falls on this year — useful when you are planning a party. The zodiac sign uses the standard tropical western date ranges; if you follow Vedic astrology the sidereal dates shift by roughly a day or two. Everything recalculates the moment you change either date, and nothing is stored anywhere.
- 100% free, no signup required
- Works entirely in your browser
- Your data never leaves your device
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