Exact age calculator

Calculate your exact age in years, months and days from your date of birth, as of today or any other reference date.

Processed on your device. Nothing is sent to any server.

Date of birth

Calculate as of

Years

Months

Days

9770

Total days

Calculates the exact difference in whole years, months and days between the birth date and the reference date, plus the total days lived.

Use cases

1
Enter your date of birth
Select the day, month and year of birth.
2
Choose the reference date
It defaults to today, but you can calculate the age as of any other date.

Example: someone born on May 15, 1990 is 35 years, 9 months and 23 days old on March 10, 2026.
Leftover days are counted using the real length of the month before the reference date (28, 29, 30 or 31 days).
For someone born on February 29, in non-leap years the birthday is reached on March 1.
The reference date must be after the birth date; with the dates reversed the result isn't meaningful.

Does it account for leap years?

Yes, the calculation uses real calendar dates, so leap years are automatically taken into account.

How do I find out how old someone will be on a future date?

Change "Calculate as of" to that future date; today's date is used by default.