Age Calculator
Find your exact age in years, months, and days.
Your age26 years, 8 months, 9 days
Total months320
Total weeks1,392
Total days9,749
Press Escape while editing a field to reset.
What is the Age Calculator?
An age calculator tells you your exact age from your date of birth — in years, months, and days, plus totals in months, weeks, and days. It handles leap years correctly and can calculate your age as of any date.
Formula & how it works
Age = Reference date − Date of birth (in years, months, and days)The calculation is calendar-aware and accounts for leap years by borrowing the correct number of days from the previous month when needed.
Example
Born on 1 January 2000, calculated on 1 January 2025.
Inputs
- Date of birth
- 1 Jan 2000
- As of
- 1 Jan 2025
Results
- Age
- 25 years, 0 months, 0 days
How to use this calculator
- 1Enter your date of birth.
- 2Optionally change the reference date (defaults to today).
- 3See your exact age plus total months, weeks, and days.
Frequently asked questions
Does this account for leap years?+
Yes. The calculator uses actual calendar months and correctly handles leap years.
Can I calculate my age on a future date?+
Yes. Change the reference date to any date to see your age as of that day.