Chronological Age Calculator

Use our calculator above to find your exact chronological age. Enter your birth date and the date you want to calculate your age as of. The result shows your age in years, months, and days. For example, if you were born on January 15, 1990 and want to know your age on December 31, 2024, you would be 34 years, 11 months, and 16 days old.

Our calculator uses precise date arithmetic to determine your exact chronological age between two dates. We count the exact number of years, months, and days between your birth date and the end date, accounting for leap years and varying month lengths. For example, if you were born on February 29, 2000 (a leap year), the calculator correctly handles the leap day in subsequent calculations.

Chronological age is your actual age based on the time that has passed since your birth date. It's the most commonly used measure of age for legal, medical, and social purposes. Biological age refers to how old your body appears based on various health markers, which may differ from your chronological age. Mental age is a measure of cognitive development compared to typical development at different chronological ages.

This calculator is perfect for calculating your current age, finding your age on a specific date in the past or future, calculating age differences between people, determining eligibility for age-restricted activities, planning for milestone birthdays, and calculating age for legal documents.

Our chronological age calculator is highly accurate and accounts for leap years (including century rules), varying month lengths (28, 29, 30, or 31 days), precise day counting, and time zone considerations. The calculation provides your exact age down to the day, making it suitable for legal, medical, and personal use.

Yes, you can calculate the age of anyone by entering their birth date and the date you want to know their age as of. This is useful for parents tracking their children's ages, HR departments calculating employee ages, or anyone needing to determine someone's age for legal or administrative purposes.

You can enter any future date as the end date to see what your age will be on that date. For example, if you want to know your age on your next birthday, simply enter your birth date and the date of your upcoming birthday. This is useful for planning milestone celebrations or understanding age requirements for future events.

The calculator correctly handles leap years by accounting for the extra day (February 29) in leap years. For example, if you were born on March 1, 2000, and want to know your age on February 28, 2024, you would be 23 years, 11 months, and 27 days old. The calculator properly accounts for the fact that 2024 is a leap year.