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Enter a date of birth to calculate exact age in years, months, and days, see total days lived, and count down to the next birthday. Everything is calculated instantly in your browser.
Calculate age now–
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This calculator works out your exact age in years, months, and days from your date of birth, along with extra details like total days lived, which day of the week you were born on, and how long until your next birthday. All calculations happen locally in your browser.
See your age precisely in years, months, and days, not just a rounded number.
Find out how old you were, or will be, on any past or future date.
See exactly how many days remain until your next birthday.
Your date of birth never leaves your browser.
| Date of birth | As of | Result |
|---|---|---|
2000-02-29 | 2026-07-31 | 26 years, 5 months, 2 days |
1995-01-01 | 2030-01-01 | Exactly 35 years, 0 months, 0 days |
This calculator counts full years, then full months, then remaining days between your date of birth and the reference date, correctly accounting for different month lengths and leap years.
Yes. Change the "Calculate age as of" field to any date to see how old you were, or will be, on that day.
Total months and weeks lived are calculated from the exact number of days between the two dates, not by multiplying years, so they reflect real calendar time including leap years.
Yes. Because the calculation is based on actual calendar dates rather than a fixed 365-day year, leap years are automatically handled correctly.
No. The calculation happens entirely in your browser using client-side JavaScript. Nothing you enter is sent to a server or stored.
It is based on the Western tropical zodiac date ranges for your day of birth, shown as a fun extra alongside the exact age calculation.