How the age calculator works
Enter a date of birth and the tool calculates your age in years, months and days up to today, or up to any date you choose. It also works as a general date difference calculator for projects, pregnancies, anniversaries and deadlines.
Leap years and month lengths
Months have different lengths and leap years add an extra day to February. The calculator uses the real calendar, so the results account for these differences automatically.
Useful ways to use it
- Check how old you will be on a future date.
- Count days until or since an important event.
- Find the length of a contract, subscription or project.
- Calculate someone's exact age for forms and applications.
Frequently asked questions
Can I calculate a future date?
Yes. Set the end date to any date in the future.
Are leap years included?
Yes. The calculation uses the real calendar including leap days.
Does it work for any date?
It works for any valid date supported by your browser.