An age calculator is a tool or program designed to determine a person's age based on their date of birth. It is a simple yet useful utility that can be implemented in various forms, such as standalone software, web applications, or integrated features within other applications.
The fundamental principle behind an age calculator is straightforward. It takes the user's input, usually in the form of a date of birth, and calculates the difference between that date and the current date to determine the person's age.