Age Calculator
Enter a date of birth to calculate exact age in years, months and days -- as of today, or any date you choose.
Enter dates
Result
Enter a date of birth and calculate to see the result here.
How it works
Enter a date of birth, and optionally a different "as of" date -- otherwise today's date is used. The calculator works out the exact age in years, months and days using calendar arithmetic, along with the total number of months and total number of days lived. Leap year birthdays (February 29) are handled correctly: in a year with no February 29, the birthday is treated as completing on March 1. Everything is calculated locally in your browser.
Does this handle leap year birthdays like February 29?
Yes. In years without a February 29, the age calculation treats March 1 as the day the birthday completes.
Is my date of birth stored or sent anywhere?
No. The calculation happens entirely in your browser. Analytics only records that the tool was used, never the dates you enter.