Calculate exact age in years, months, days, hours and minutes.
Calculating exact age sounds simple until you factor in leap years, varying month lengths, and the fact that "years old" alone doesn't tell you how many months and days have passed since the last birthday. This tool handles that arithmetic precisely, giving you an exact breakdown in years, months, and days between any two dates.
It's useful well beyond just "how old am I" — for calculating someone's age as of a specific future or past date, working out an exact duration for legal or administrative purposes, or simply satisfying curiosity about a milestone date.
Does it account for leap years?
Yes, the calculation is based on actual calendar dates, so leap years are automatically factored into the result correctly.
Can I calculate age as of a past or future date, not just today?
Yes — enter any date in the "Age on Date" field, and the calculator will show the exact age as of that date instead of today.
What if I only know the birth year, not the exact date?
You'll get the most accurate result with a full date of birth. If you only have a year, using January 1st as an approximation will give you a reasonable estimate of years elapsed.