The calculation uses the two dates you enter and accounts for months of different lengths and leap years. Some official bodies calculate age their own way (for example, in completed years only, or up to a set date such as the start of a school year), so check the method used by whoever is asking for your age.

How is age calculated precisely?

The calculator counts full years, months, and days between your date of birth and the chosen date, accounting for months of 28, 29, 30, or 31 days and for leap years. That makes it more accurate than simply dividing a number of days by 365.

Common uses

Official forms: many forms ask for age in years and months.
Job and scholarship applications: check that you meet an age requirement on a given date.
Children's ages: track a child's age in months and days in their early years.

Frequently Asked Questions

What if I was born on February 29?

In non-leap years there is no February 29, so the calculator treats your birthday as March 1 in those years, which is the most common convention.

Can I calculate my age on a future date?

Yes. Change the second date to any future date to see how old you will be then, which is useful for checking an age requirement by an upcoming deadline.