How to Calculate Your Exact Age in Years, Months, and Days

Quick Answer

To calculate your exact age: subtract your birth date from today's date, accounting for months and days. An age calculator gives your precise age in years, months, and days instantly. For example, someone born on 15 March 1995 is 30 years and 10 months old as of January 2026.

What an Age Calculator Shows

A complete age calculator displays your age multiple ways: exact age in years, months, and days; total months lived; total weeks; total days; and sometimes total hours or minutes. It can also calculate the gap between any two dates, not just from birth to today.

How to Calculate Age

Open the Age Calculator

Enter your date of birth

The tool uses today's date automatically, or enter a specific end date

See your exact age broken down into years, months, and days

How Age Is Calculated Correctly

Calculating age is not simply subtracting years. You must account for whether the birthday has occurred this year. If today is before your birthday this year, subtract one from the year difference. The days and months are then computed by borrowing from the next larger unit, similar to long subtraction. Leap years (adding February 29) are handled automatically by date logic.

Common Uses

Age calculators are used for filling exact age on official forms and applications, checking eligibility for jobs, exams, or schemes with age limits, calculating age for visa and immigration forms, working out how many days until a birthday, and finding the exact gap between two events.

Example

Someone born on 10 August 2000, calculated on 25 January 2026, is 25 years, 5 months, and 15 days old, which is 306 months or roughly 9,300 days.

Age Eligibility Note

For official purposes (government exams, jobs), age is often calculated as of a specific cut-off date, not today. Enter that cut-off date as the end date to check eligibility accurately.