Age Calculator
Find your exact age in years, months and days. Enter your date of birth and, optionally, an end date, and the calculator works out the precise time between the two, including the total number of days.
Exact age
— years
Total months—
Total weeks—
Total days—
Total hours—
How it works
The calculator counts full years from the birth date to the target date, then the remaining whole months, then the leftover days, accounting for the differing lengths of each month and for leap years. It is the same method you would use counting on a calendar, done instantly.
Frequently asked questions
How is exact age calculated?
It counts complete years first, then the remaining complete months, then the remaining days, adjusting for month lengths and leap years.
Can I calculate age on a future or past date?
Yes. Set the second date to any date you want and the calculator shows the age or gap as of that date.
Does it account for leap years?
Yes. Leap years are handled automatically so the day count is accurate.