Age Calculator
Exact age in years, months, and days from date of birth.
Guide: Age Calculator
Find exact age in years, months, and days from your date of birth. Optionally set an “as of” date for anniversaries, legal milestones, or eligibility checks. Parents tracking monthly milestones, schools verifying cut-off dates, and immigration forms referencing completed years all lean on the same calendar arithmetic—just remember policy wording differs by institution.
Calendar vs clock edge cases
We use calendar dates at noon to reduce timezone edge cases in the browser. For legal age, always confirm with official rules in your jurisdiction.
Leap day birthdays (29 February) sometimes celebrate on 28 February or 1 March in non-leap years depending on cultural or legal convention.
Completed years vs school grade cut-offs
Many school systems admit based on age as of a specific September date. Use the “as of” field to match that snapshot instead of today’s date.
Privacy reminder
Birth dates are sensitive identifiers. Avoid sharing screenshots with strangers; our static pages do not need an account, but your browser history still stores visits locally.