About the Age Calculator
Enter a birth date and get exact age in years, months and days, total days lived, day of the week you were born, and a live countdown to the next birthday.
Handles leap years and month lengths precisely — useful for forms, astrology, HR paperwork and simple curiosity.
How to use the Age Calculator
- Enter the date of birth.
- Optionally change the "calculate at" date (defaults to today).
- Read the exact age breakdown and next-birthday countdown.
Common uses
Filling official forms requiring exact age
Calculating age at a past or future date
Birthday countdowns
Frequently asked questions
How are leap years handled?
The calculation uses real calendar arithmetic, so February 29 birthdays and leap years are handled exactly.
Can I calculate age at a specific date?
Yes — change the second date to any past or future date.
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