Age Calculator

How Age Calculation Works

Age calculation determines the time elapsed between your birth date and a target date. The calculation accounts for varying month lengths and leap years to provide accurate results in years, months, and days.

Age Calculation Formula

When the target day is less than the birth day, borrow days from the previous month. When the target month is less than the birth month, borrow a year and add 12 months.

Leap Year Handling

Leap years occur every 4 years, except for years divisible by 100 but not by 400. February has 29 days in leap years and 28 days in common years. This affects age calculations for people born on February 29.

Age in Different Units

Express your age in various time units for different purposes. Scientists use seconds for precise measurements, while everyday life uses years and months.

Practical Examples

Frequently Asked Questions