Age Calculator — Exact Age in Years, Months & Days

Exact age, the calendar-correct way

Subtracting years isn't enough — whether you've had this year's birthday yet changes the answer, and month lengths complicate the remainder. This calculator walks the calendar properly to give your age in years, months and days, plus total days, weeks and months lived, the weekday you were born, and a countdown to your next birthday. Set the "as of" date to compute age at any moment — useful for forms, school cutoffs and eligibility rules.

Frequently asked questions