Age Calculator
Calculate exact age in years, months, days, hours and minutes.
About Age Calculator
Age looks trivial until you need it precisely: months have different lengths, leap years shift the count, and "two years and eleven months" is not the same as "35 months" in every context.
This calculator gives the exact elapsed time between a birth date and any reference date, broken into years, months and days, plus the total in each unit and a countdown to the next birthday.
Frequently asked questions
How are leap years handled?
Calendar arithmetic is used rather than a fixed 365-day year, so leap days are counted correctly.
What happens on 29 February birthdays?
In non-leap years the anniversary is treated as 1 March, which is the most common civil convention.
Can I calculate age at a past or future date?
Yes, change the "as of" date to any date you like.