Age Calculator
Find your exact age in years, months and days from your date of birth — correctly handling month lengths and leap years. You also get total days lived and the countdown to your next birthday. Change the "as of" date to compute age at any point in time (useful for school admissions, visas and official forms).
How exact age is calculated
Age is the calendar difference between two dates, not just a division of days by 365. The calculator subtracts years, months and days separately, borrowing from the previous month when the day-of-month of the birth date hasn't been reached yet — the same way ages are computed on official documents.
Frequently asked questions
How is age calculated in years, months and days?
Subtract the birth date from today's date field by field. If the day is negative, borrow the length of the previous month; if the month is negative, borrow 12 months from the years. This mirrors how ages are stated on legal and school documents.
How does the calculator handle leap years?
Dates are handled on the real calendar, so February 29 birthdays and leap-year day counts are exact. Someone born on Feb 29 has their calendar birthday counted on Mar 1 in non-leap years.
Can I calculate age at a past or future date?
Yes — change the "as of" date. That gives your exact age on that day, which is what admission forms and visa applications usually ask for.