ironroot

Age Calculator

Work out an exact age in years, months and days.

  • Private
  • No sign-up
  • Works in your browser

Defaults to today.

Enter a valid date of birth on or before the chosen date.

What is the Age Calculator?

Enter a date of birth to work out an exact age in years, months and days at any chosen date, along with the total days lived and a countdown to the next birthday.

How to use it

  1. 1Enter a date of birth.
  2. 2Optionally change the ‘age at’ date.
  3. 3Read the exact age and next-birthday countdown.

Common uses

  • Working out an exact age
  • Counting down to a birthday
  • Checking age for forms and eligibility

Frequently asked questions

Can I work out my age on a future date?

Yes. Change the ‘age at’ date to any date to see how old you (or someone else) will be then.