An age calculator is a tool used to calculate a person's age based on their date of birth. It operates by taking the current date, subtracting the birth date year from the current year, and then accounting for any potential remaining months or days. This tool can be helpful for people who need to quickly calculate their age for various reasons such as filling out forms, applying for jobs, or health screenings. It can also be useful for individuals who need to calculate the age difference between two people, such as parents or grandparents. An age calculator can typically be found online or on a smartphone application, making it accessible and convenient for users.