Calculate an exact age from a date of birth and a selected end date. The result can be shown in years, months and days for easy everyday use.
How to use the Age Calculator
- Enter the date of birth.
- Choose the date on which age should be calculated, or use today.
- Calculate to see the elapsed age.
How age is calculated
The calculator compares calendar years, months and days rather than simply dividing the number of elapsed days by 365.
Example
A person born on 15 January 2000 is 26 years old on 15 January 2026. On a date before the birthday, the completed-year value remains 25.
Important considerations
Calendar conventions and leap years affect day counts. For legal eligibility or official records, use the date and rules specified by the relevant authority.
Limitations
This is an age/date calculation utility and is not a legal determination of eligibility.
Frequently asked questions
Can I calculate age on a future date?
Yes. Select the future date as the calculation date to see the age at that point.
Does the calculator handle leap years?
Yes, the date calculation uses calendar dates and therefore accounts for leap-year dates.
Content note: Methodology note. Calculation results depend on the inputs and assumptions shown on this page.