Age Calculator
Pick your date of birth to get your exact age — down to the day — plus your next birthday countdown.
How exact age is computed
The calculator counts full calendar years first, then full months, then remaining days — handling leap years and month lengths correctly. It also shows total days lived and how many days remain until your next birthday, which is handy for official forms, visa applications and school admissions.
Formula used
Leap years and varying month lengths are handled automatically.
How to use this tool
- 1Pick your date of birth.
- 2Set the 'age as of' date (defaults to today).
- 3Tap Calculate.
- 4See exact age plus days to your next birthday.
Frequently asked questions
How is exact age calculated?
Full calendar years are counted first, then full months, then remaining days, correctly handling leap years and different month lengths.
Why do official forms ask for age in years, months and days?
Visa applications, school admissions and pension paperwork often require exact age on a specific date, which is hard to compute mentally across leap years.
Does this work for past or future dates?
Yes — change the 'Age as of' date to any date after the birth date to compute age at that moment.