How to Use the Age Calculator
- Enter your date of birth.
- Optionally change the 'age at' date to any other date.
- See your exact age in years, months and days.
- View total days lived and days until your next birthday.
Frequently Asked Questions
How is exact age calculated?
The tool counts full years, then remaining months, then remaining days between your birth date and the target date, adjusting for month lengths and leap years.
Can I calculate age at a past or future date?
Yes. Change the 'age at' date to any date to find how old someone was — or will be — on that day.
Does it account for leap years?
Yes. February 29 and varying month lengths are handled using real calendar dates, so the day count is accurate.
Is my birth date stored anywhere?
No. The calculation happens entirely in your browser and nothing you enter is sent or saved.