Age calculator
Enter your date of birth to find your exact age in years, months, and days as of today. The tool also shows your age in total days lived.
How it works
All date arithmetic uses the browser's native Date object. Day differences are computed by subtracting timestamps and dividing by 86,400,000 ms. Age is broken into complete years, remaining months, and remaining days by comparing each component of the date individually. The page does not call any external library or server during the calculation.
Processing runs in your browser
All calculations happen instantly in your browser tab. Our servers are not involved at any point.
Related operations
For working out an exact age in years, months, and days, try the age calculator. To convert any timestamp into a date, use Unix timestamp. For scheduling work across time zones, see the timezone converter.
Frequently asked questions
- How is the age calculated?
- The tool calculates the difference between today's date and your birth date, breaking it into complete years, remaining months, and remaining days.
- What if my birthday is today?
- If today is your birthday, the days and months remainder will be 0, and the years will increment by 1. Happy birthday!
- Can I calculate someone's age from a past or future date?
- The age calculator always uses today's date as the reference. For a different reference date, use the 'Days between dates' calculator.