All age calculators

Free, instant, browser-based date calculators. No data is sent to a server.

Age adjusted for premature birth, for infant assessments and growth checks.

Exact age in years, months and days from a birth date to any test date. Handy for educators, clinicians and parents.

The precise gap between two people in years, months and days. Useful for siblings and assessments.

How long until the next birthday in days, hours and minutes, with zodiac sign and birthstone.