Free Age Calculator - Calculate Your Exact Age
Calculate your exact age in years, months, and days instantly with precise calculations.
Formula & Methodology
The Age Calculator counts the time between your birth date and today, breaking it into years, months, and days. It divides the total elapsed days by 365.2425 (the average length of a Gregorian year, accounting for leap years) to get whole years, then works out remaining months from the month difference and remaining days from the day-of-month difference.
- Age = FLOOR((TodayDate − BirthDate) / 365.2425)
- Months = (TodayYear − BirthYear) × 12 + (TodayMonth − BirthMonth)
Worked Example
Using the Age Calculator: apply the formula above to your input values. For instance, Age = FLOOR((TodayDate − BirthDate) / 365.2425), then Months = (TodayYear − BirthYear) × 12 + (TodayMonth − BirthMonth). The tool performs each step instantly and shows the result.
Frequently Asked Questions
How is exact age calculated?
It counts the full years, months and days between your birth date and a chosen date, accounting for leap years and differing month lengths.
Can I find my age on a future date?
Yes. Set the target date to any past or future day to see how old you were or will be then.
Does it handle leap-year birthdays?
Yes. February 29 birthdays are handled correctly so the day and month counts stay accurate.