Age Calculator
Compute exact age in years, months, and days.
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Frequently asked questions
When the day-of-month on the as-of date is smaller than on the birth date, the calculator borrows from the previous month using its actual length. Feb 29 birthdays line up cleanly on leap years and shift to Feb 28 otherwise.
Yes. The as-of date fields default to today, but you can set them to any past or future date as long as it is on or after the birth date.
No — the dates are treated as plain calendar dates with no time-zone component. If you were born on the boundary of a date-line shift, pick whichever local date matches your birth certificate.
Last updated 2026-06-03.