Age & birthday calculator
Exact age in years, months and days, plus days to your next birthday.
How it's calculated
Calendar difference in years, months and days.
- Gregorian calendar
Version 1.0 · exact decimal maths · inputs are not stored.
Questions
How are leap-year birthdays handled?
For 29 February birthdays, non-leap years use 28 February as the birthday.
Can I check age on a past or future date?
Yes — enter the date under “Age on”. This is useful for admission or job age limits.