Numbers & Calculators
Enter a date of birth to find your exact age down to the day, the weekday you were born, and how many days remain until your next birthday.
Free · no sign-up · runs in your browser · updated
Enter a date of birth to see the age.
Enter the date of birth.
The reference date is today by default. Change it to work out an age on another date, such as an age cut-off for an application.
Read the age in years, months and days, along with total days and the birthday countdown.
Age is calculated by subtracting years, months and days in turn. If the day of the reference date is smaller than the birth day, one month is “borrowed” and the days of the previous month are added. This keeps the result consistent with how we count birthdays on a calendar.
Changing the reference date is useful for checking age requirements, such as the age limit for school enrollment or a job opening, which is usually measured on a specific date rather than today.
In a year that is not a leap year, 29 February does not exist. This tool treats the birthday as falling on 1 March. Official rules for legal purposes can differ, so refer to the relevant institution’s rules when needed.
Subtract the date of birth from the reference date: years minus years, months minus months and days minus days. If the days or months come out negative, borrow from the next unit up.
Yes. Change the reference date to the date you want, for example 1 July of a new school year, to see the age on that date.
Because leap years have 366 days. This tool counts the actual days between two calendar dates.
No. All calculations run in your browser.
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