Free health tool
Age Calculator
Enter a date of birth to get an exact age in years, months and days. Many health checks and screening programmes are based on age.
Enter a date of birth to calculate an exact age. Nothing you enter leaves your device.
Calculated in your browser. Nothing you enter is sent or stored.
How this tool works
- 1Enter a date of birth and, optionally, the date to calculate on (today by default).
- 2The tool counts whole calendar months, then the remaining days.
- 3For birthdays on 29 February, the next birthday in a non-leap year is counted as 28 February.
Limitations
- Dates are calculated in calendar days and ignore time zones and time of birth.