Calculate your exact age

Enter a date of birth to see the exact age in years, months and days, the total number of months, weeks and days lived, and how long until the next birthday.

Date of birth calendar

GregorianHijri

Date of birth

Age on this date

Calculations run on this device. We don't see, store or log the numbers or dates you enter.

How it works

Pick the date of birth.
Keep today's date, or pick another date to see the age on that day.
Read the age and totals below, or tap Copy.

How the age is calculated

Whole years and months are counted first, then the remaining days. Someone born on 15 May 1990 is 36 years, 4 months and 13 days old on 28 September 2026, which is 13,285 days or 1,897 weeks. Leap years are included in the day count.

Useful for forms and deadlines

Many forms ask for age on a specific date, such as a school entry cut-off or an exam deadline. Change the second date to that day: a child born on 1 October 2020 is 5 years old on 30 September 2026 but 6 the next day.

Birthdays on 29 February

In years without 29 February, the birthday countdown uses 28 February. Some countries legally count 1 March instead, so check local rules for legal ages.

Age on the Hijri calendar

Choose Hijri to enter a Hijri date of birth, or keep Gregorian: either way you get your age on both calendars. Because a Hijri year has 354 or 355 days, the Hijri age runs ahead: someone born on 15 May 1990 is 36 Gregorian years old on 30 September 2026 but 37 years, 5 months and 28 days old in Hijri years. Hijri dates follow the Umm al-Qura calendar; where months start by local moon sighting, a date can be one day apart.

Worked examples

Exact age on a given date
Born	On	Age
May 15, 1990	September 30, 2026	36 years, 4 months, 15 days
February 29, 2000	February 28, 2026	25 years, 11 months, 30 days
December 31, 1985	January 1, 2026	40 years, 1 day
July 4, 2010	July 4, 2026	16 years

Frequently asked questions

How old am I in days?

Enter your date of birth: the total days are shown below your age. 10,000 days is about 27 years and 4 months.

Does it use my time zone?

Dates are counted as whole calendar days, so the result is the same in every time zone.

Is my date of birth stored?

No. Nothing you enter leaves your device.

Last reviewed: September 30, 2026