Enter a date of birth to get the exact age in years, months and days, the total number of weeks and days, and how long until the next birthday.
- Free, no sign-up
- Runs locally in your browser
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Your files are processed on this device and are never uploaded to a server.
How to use the Age Calculator
- 1
Enter the date of birth.
- 2
Optionally change the 'age on' date.
- 3
Read the results.
Leap year birthdays
For people born on 29 February, the next birthday in a non-leap year is counted as 1 March, the common legal convention.