Age calculator

Enter your date of birth and see exactly how old you are – to the day, with a countdown to your next birthday.

–years old
–Exactly
–Months
–Weeks
–Days
–Hours
–Until your next birthday

Born on:

100% private: everything is processed locally in your browser. Your data never leaves your device.

How to use

  1. Enter your date of birth.
  2. Optionally choose a different reference date (default: today).
  3. Read your age in years, months and days, plus weeks, days and hours lived.

Why use an age calculator?

For forms, age limits, anniversaries or pure curiosity: how many days have I been alive? What weekday was I born on? When is my 10,000th day?

With the reference date you can also work out your age on a specific date, e.g. a school start or retirement. Leap years are handled correctly.

Frequently asked questions

How are February 29 birthdays handled?

In non-leap years the birthday falls on March 1.

Can I calculate my age on an earlier date?

Yes, just change the reference date.

Is my date of birth stored?

No. It only appears in the address bar so you can share the result.