Free date and time tools
Calculate age precisely from a Gregorian date of birth.
Enter the requested date details, then select Calculate.
Age is calculated with calendar boundaries, not an average year length, so birthdays and leap years are handled correctly.
Enter a date of birth to see complete years, remaining calendar months and days, plus the next birthday.
The calculator counts completed calendar years, then months and days, instead of dividing milliseconds by an average year.
In a non-leap year, the calculation uses the last valid day of February for the calendar comparison.
Yes. The calculation runs in your browser and does not require an account.