Age Calculator
Enter a date of birth to find your exact age in years, plus days until your next birthday and the total number of days you have been alive.
Input
YYYY/MM/DD
YYYY/MM/DD
Result
Enter a date of birth and an as-of date.
How it works
- Enter your date of birth and an as-of date (the date you want your age for; today by default). Your age is the number of times your birthday has occurred up to and including the as-of date.
- “Days until next birthday” counts from the as-of date to your next birthday. If the as-of date is your birthday, it shows 0.
- “Days since birth” is the total number of calendar days between your date of birth and the as-of date.
- Kazoe age is a traditional East Asian way of counting: you are 1 at birth and gain a year every New Year's Day. It is shown for reference.
- Ages are counted up by one on each birthday (the everyday method). All calculations run in your browser.