How to use the Age Calculator
- Pick your date of birth.
- Leave “Age on” as today or choose any other date.
- See your exact age plus totals and your next birthday.
How it works
Age is counted in whole calendar years, then remaining whole months, then days, borrowing days from the previous month when needed — the same way people state age in everyday life.
Frequently asked questions
How is age calculated for leap-day birthdays?
Someone born on February 29 reaches a new year of age on March 1 in non-leap years in most legal systems; the calculator follows calendar arithmetic.
Can I calculate age at a past or future date?
Yes — change the “Age on” date to any date after the birth date.