About Age Calculator
Calculating age precisely is harder than subtracting years, because months vary in length and leap years add a day every four years. This calculator returns your exact age in years, months, and days from any date of birth, along with totals in days and your next birthday.
How to use
- Select your date of birth.
- Optionally change the date you want to calculate age as of.
- Read your exact age in years, months, and days.
Frequently asked questions
How is exact age calculated?
Years are counted first, then remaining months, then leftover days, borrowing from the previous month where needed. This matches how age is stated conversationally rather than dividing total days by 365.
Are leap years handled?
Yes. Day counts use real calendar dates, so the extra day in each leap year is included automatically.