🎂 Age Calculator
Find your exact age in years, months, and days, plus total days lived and how long until your next birthday.
Your Dates
Your Result
How the Age Calculator Works
This calculator determines your exact age by computing the calendar difference between your date of birth and the reference date, correctly accounting for varying month lengths and leap years.
Method
Months = remaining full months after subtracting years
Days = remaining days after subtracting years and months
(borrowing days/months from the calendar as needed)
Frequently Asked Questions
How is age calculated to the exact day?
We subtract your birth date from the reference date using calendar-aware arithmetic, so months of different lengths (28–31 days) are handled correctly instead of assuming a fixed 30-day month.
Does this account for leap years?
Yes. Because the calculation is based on actual calendar dates rather than a fixed 365-day year, leap years (including February 29) are automatically handled correctly.
Can I calculate age as of a future or past date?
Yes. Change the "Calculate Age As Of" field to any date to see what your age was or will be on that date.