Age Calculator
Calculate your exact age in years, months, and days from your date of birth. Accurately accounts for leap years and varying month lengths to give you a precise age breakdown.
How to Use This Calculator
- Enter your Date of Birth using the date picker.
- Optionally enter a reference date (defaults to today) to calculate your age at a specific point in time.
- Click Calculate Age to see your exact age in years, months, and days.
Formula
The algorithm subtracts the birth date from the target date, adjusting for cases where the target day-of-month is less than the birth day-of-month (borrowing from the month) and where the target month is less than the birth month (borrowing from the year).
Examples
Age = 36 years, 5 months, 26 days.
Age = 25 years, 0 months, 1 day. (Just barely turned 25!)
Age = 22 years, 0 months, 1 day.
Frequently Asked Questions
Does this calculator handle leap years?
Yes. It correctly accounts for leap years and varying month lengths (28, 29, 30, 31 days) for precise age calculations.
Can I calculate someone else's age?
Yes. Use the optional "Calculate Age At" field to compute anyone's age as of a specific date, useful for eligibility checks or age-restricted activities.
What is the age in total days?
The additional details section shows your total age in days, hours, and minutes for extra precision.