Age Calculator
Find the exact age between a date of birth and any target date, in years, months, and days.
Calculated locally. Your dates never leave your browser.
Common questions
Can I calculate age as of a future date, not just today?
Yes — the "As of" field accepts any date, past or future. The only requirement is that the date of birth falls on or before it.
How are leap years and February 29 birthdays handled?
Correctly: in a non-leap year, a February 29 birthday's anniversary is treated as February 28 rather than spilling into March, matching how this is conventionally handled elsewhere.
Does this account for time zones or time of day?
No, and it doesn't need to — both dates are treated as plain calendar dates (year, month, day only), the same way a birth certificate would show them, with no time-of-day or time zone component involved anywhere in the calculation.