Math
Age Calculator
Find your exact age in years, months, and days — plus a countdown to your next birthday.
years old
Years
Months (total)
Days (total)
Hours (total)
Weeks (total)
How Age Is Calculated
Age is calculated by comparing the date of birth to the reference date. The year count increments only after the full birthday has passed, so if you were born on December 31 and today is December 30, you haven't yet turned the next year older.
Total months and total days are cumulative figures — not the months and days of the current partial year. Hours assume each day is exactly 24 hours.