Age calculator
Choose a birth date and the date to measure. If that date is before the birth date, there is no result.
How to use it
- Enter a birth date. The As of field starts as today.
- The page shows years, months, days and the total number of days.
- Next birthday is the number of days from the as-of date to the following birthday. A 29 February birthday is counted to 1 March in a year without that day.
Common questions
Which day is the age measured to?
To the date in the as-of field, which starts as today.
How is the next birthday counted?
It is the number of days from the as-of date to the following birthday.
How is the next birthday counted for 29 February?
In a year that has 29 February, it is counted to that day. In a year without it, it is counted to 1 March.