Calculator guide
Age Calculator: Calculate Age From Date of Birth
An age calculator finds the exact difference between a birth date and today, usually in years, months, and days. It is useful for forms, eligibility checks, school records, birthdays, and quick personal calculations.
How it works
The calculator compares the birth year, month, and day with the current date. If the birthday has not arrived yet in the current year, one year is subtracted from the simple year difference.
Common searches this page supports
Age calculator, date of birth age calculator, how old am I, calculate my age, and age in years months days.
FAQ
Can I calculate age for a future date?
Use the date difference calculator when you need age or duration between two custom dates.
Is age calculated using leap years?
The calculator uses calendar dates, so leap years are naturally handled by the browser date system.