EVERYDAY CALCULATORS
Age Calculator — Exact Age in Years, Months, Days
Calculate your exact age in years, months, and days from your date of birth. Accounts for leap years, runs in your browser, private, no signup.
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Find out exactly how old you are — in years, months, and days — from your date of birth. Enter the day you were born and the tool works out the precise gap to today, or to any date you choose.
It counts real calendar days rather than assuming a fixed month length, so leap years and the differing lengths of months are handled correctly. Everything runs in your browser; your date of birth is never uploaded.
Frequently asked questions
- Why isn't my age just my years times 365 days?
- Because months vary in length and leap years add a 29th of February every four years. Two people the same age in years can differ by a day or two in exact day count depending on how many leap years fell in their lifetimes, so the tool computes the true calendar difference.
- Can I calculate age as of a past or future date?
- Yes. It defaults to today, but you can set any 'as of' date to find how old someone was on a past date or will be on a future one — useful for eligibility cut-offs and anniversaries.