Age Calculator
Calculate your exact age in years, months, and days between two dates, plus total days, weeks, and months lived.
Inputs
Leave blank to use today's date.
Result
Fill in the fields to see your result.
Formula
Age is computed by subtracting the birth date from the comparison date, then normalizing negative days/months by borrowing from the next larger unit.
years = asOf.year − birth.year (adjusted for month/day borrow)Step-by-step
- 1
Enter your date of birth
Pick the exact date you were born.
- 2
Optionally set a comparison date
Leave blank to calculate your age as of today.
- 3
Read your exact age
Years, months, and days update instantly, along with total days, weeks, and months lived.
Examples
Born Jan 15, 2000
- birth Date
- 2000-01-15
- as Of Date
- 2024-06-01
24 years, 4 months, 17 days old