Does the calculator account for leap years?

Yes, the calculation correctly handles leap years, so if your birthday is February 29, you'll see the right count of complete years and days.

Why is my age in months different from years × 12?

Because months have different lengths (28–31 days). Your age in complete months is the exact count of month-boundaries you've crossed since birth.

Yes — simply set the 'As of date' field to any future date to see your age at that point in time.

Date of birth

Age as of date

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