Age Calculator

Enter a birth date and get the age in years, months, days and a precise decimal years value.

How to use

  1. Pick a birth date using the date picker.
  2. Click Calculate Age to compute years, months, and days, total days, and a precise decimal years value.
  3. Use Clear to reset the input and results.

Tip: The calculator uses your browser's local time and an average year length for the decimal value. For time-of-day accuracy, add time input support — I can add that if you want.