Handitab

Age Calculator

Calculate exact age in years, months, and days from a date of birth, plus total days lived and the countdown to the next birthday.

About Age Calculator

Age is the calendar time elapsed since the date of birth. This calculator subtracts years, months, and days separately; when the day count would be negative it borrows the length of the previous month. Total days is the exact number of days between the two dates, and total weeks is that figure divided by 7, rounded down. It also shows the weekday of birth and the date of the next birthday.

How to use Age Calculator

  1. Fill in "Date of birth" and "Age on this date".
  2. The result appears below and updates as you type.
  3. Copy the result with the copy button, or download it as a file where that is offered.

Questions about Age Calculator

How is age counted for someone born on February 29?

In years without a February 29, this calculator places the birthday on March 1. Laws and customs differ by country, and some treat February 28 as the birthday instead.

Can I calculate age on a past or future date?

Yes. Change the second date to any day on or after the date of birth. This is useful for checking age on an application deadline, an event date, or a historical date.

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