Age Calculator

Find your exact age, or the age of anything, on any date.

Dates use your browser’s date picker.
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Years old
Exact age
In months
In weeks
In days
Next birthday
Born on a
Work

Saved Calculations

Items you add are saved in this browser.

NameCalculationResultRemove

How Age Is Calculated

Age counts completed years, then completed months, then leftover days. When the day of the month hasn’t been reached yet, borrow the number of days in the previous month.

Age in days = (end date − birth date) ÷ 1 day

Worked Example

Tips

People born on February 29 are treated as having a birthday on February 28 in non-leap years here. Some places legally use March 1; check if it matters. Dates are counted in whole calendar days, not hours.