Age calculator

Find your exact age from your date of birth.

Enter dates

Format: dd/mm/yyyy Format: dd/mm/yyyy

Result

Enter your date of birth and select Calculate age.

How to use

  1. Pick your date of birth.
  2. Leave Calculate age on as today, or change it to find your age on another date.
  3. Select Calculate age.
  4. Read your years, months and days, plus the totals.
  5. Select Reset to start again.

How age is worked out

The calculator subtracts your birth date from the chosen date: years, then months, then days. If the day is smaller than your birth day, it borrows one month and adds the days of the previous month.

Example: born 25 Aug 2000, on 10 Oct 2026.
Years: 26. Months: 2.
Days: 10 − 25 = −15, so borrow a month (1 left) and add 30 = 15.
Result: 26 years, 1 month, 15 days

Good to know

  • Totals count everything from your birth date to the chosen date. Weeks are rounded down.
  • Hours, minutes and seconds come from full days (midnight to midnight).
  • For a 29 Feb birthday, the next birthday in non-leap years is shown as 28 Feb.
  • Nothing is sent or stored anywhere.
  • Date of birth must be before the chosen date.

Clarifications

Why does another site show a slightly different months or days figure?

This calculator counts real calendar months, so it depends on the actual dates. Some sites divide total days by an average month length (about 30.44 days), which gives a slightly different result. Both are valid; this one matches how people normally state their age.

How is "Total months" calculated?

It is your completed years times 12, plus the extra months. For 26 years and 1 month, the total is 313 months. The leftover days are not counted as a month.

Are total hours, minutes and seconds exact?

They count whole days from midnight to midnight, then multiply. They do not include your birth time or the current time, so they can be up to a day different from a live count.

Are leap years included?

Yes. The day count uses real calendar dates, so every 29 Feb between your birth and the chosen date is counted.

Can I find my age on a future or past date?

Yes. Change "Calculate age on" to any date after your date of birth, for example an exam date, a job application deadline or a form cut-off date.

What if I was born on 29 February?

In years without a 29 Feb, your next birthday is shown as 28 Feb. Your age in years, months and days is still worked out from the calendar as normal.

Is my date of birth saved or sent anywhere?

No. Everything is calculated in your browser on your device. Nothing is stored or uploaded.

I get the message "Date of birth must be before the calculation date"

The "Calculate age on" date must be later than your date of birth. Check that both dates are entered correctly, then select Calculate age again.