Calculate precise age and time differences between two dates with comprehensive results in multiple formats
Enter two dates to calculate the exact time difference with leap year considerations
Chronological age is the actual time a person has lived, measured from their birth date to a specific point in time. It's the most common way to express age and is used in legal, medical, and educational contexts.
Our calculator accounts for leap years, which occur every 4 years (with exceptions for century years not divisible by 400). Leap years have 366 days instead of 365, adding February 29th. This affects precise age calculations, especially over longer periods.
The calculator provides multiple formats to suit different needs:
Chronological age calculations are used for: