Age Calculator
Find your exact age in years, months and days from your date of birth.
How to use
- Pick your date of birth.
- Your exact age appears in years, months and days.
- It also shows the total number of days you've lived.
How the Age Calculator works
Calculates exact age in years, months and days from a birth date, and counts down to the next birthday.
It compares the birth date to today, taking whole years first, then remaining months, then days — the same way age is conventionally stated.
Worked example
Born 15 March 1990, on 30 July 2026 you are 36 years, 4 months and 15 days old.
Things worth knowing
- Leap years are handled by working in calendar units rather than by dividing total days by 365.
- People born on 29 February conventionally observe 28 February or 1 March in non-leap years; legal treatment varies by jurisdiction.
- East Asian age reckoning traditionally counts differently, though South Korea moved to international age in 2023.
Frequently asked questions
How is exact age calculated?
It compares your birth date to today, borrowing days and months as needed to give a precise breakdown.
Does it account for leap years?
Yes — it uses real calendar dates, so leap years are handled automatically.
Why not just divide the days by 365?
Because leap years drift the result. Over 40 years the error accumulates to roughly ten days.
How is age counted for legal purposes?
In most jurisdictions you reach a given age on your birthday, using complete years — which is what this calculator reports.