Age Calculator

How to calculate age

Age is calculated as the difference between two dates: the target date (usually today) and the date of birth. The calculator computes the exact number of years, months, and days you have been alive. It accounts for leap years and different month lengths automatically.

Your exact age matters for legal documents, retirement planning, insurance quotes, and medical guidelines. Many age-related rules are based on your age in completed years, not your age rounded up.

Fun facts about time

The average person lives about 27,375 days (75 years). In that time, your heart beats about 2.5 billion times. You will spend roughly 25 years sleeping, 3 years eating, and 1 year on the toilet. Use the fun facts section of this calculator to see your personal numbers.