Age Calculator
Calculate exact age in years, months, and days.
How the Online Age Calculator Works
This exact age calculator determines your precise chronological age from your date of birth up to the current date or any specified target date. It breaks down your life duration into exact years, months, days, as well as total elapsed days and weeks.
How Exact Age is Calculated
Calculating chronological age requires adjusting for leap years (366 days) and the varying lengths of months (28, 30, or 31 days). The system subtracts the birth date from today's date using standard Gregorian calendar rules:
- Days: Current day minus birth day (borrowing days from the preceding month if negative).
- Months: Current month minus birth month (borrowing 12 months if negative).
- Years: Current year minus birth year.
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Get Free AccountFrequently Asked Questions
How does the calculator handle leap years?
The calculator accounts for February 29th across all leap years between your birth year and the current year, providing the exact total day count.
Can I calculate my age on a specific future or past date?
Yes. By default it calculates your age as of today, but you can compare any two calendar dates to find the exact difference.
Why does my age in days differ across some online calculators?
Some basic calculators estimate years as a flat 365 days, ignoring leap years. This tool uses the full Gregorian calendar for 100% precision.