Age Calculator
Calculate exact age in years, months, and days, plus total days lived and days to your next birthday.
About this tool
Exact age matters more often than you might expect: eligibility cutoffs, legal documents, astrology, pensions, and school enrollment all hinge on precise years, months, and days rather than a rough number.
This calculator handles leap years and varying month lengths correctly, counting complete years first, then complete months, then remaining days. Leave the second date blank to calculate age as of today.
Frequently asked questions
How are leap years handled?
The calculation works on real calendar dates, so February 29 birthdays and leap year day counts are handled exactly.
Can I calculate the time between any two dates?
Yes. Set the date of birth field to the earlier date and the second field to the later date.