Free online calculator

Age Calculator

Enter a date of birth to find an exact age in calendar years, months, and days—today or on any date you choose.

Enter a valid date of birth.
Defaults to today.
The calculation date cannot be before the birth date.

Your birth date is processed in your browser and is not stored or uploaded.

Your exact age

Your age at a glance

How to calculate your age

Age is based on completed calendar years, months, and days. That is more accurate than dividing the number of days lived by 365 because months differ in length and some years include February 29.

How old am I?

Enter your date of birth and select Calculate Age to see your current exact age, total days lived, the weekday you were born, and details about your next birthday.

Calculate your age on a specific date

Use the optional second date to find how old you were on a date in the past or how old you will be on a future date—for example, June 1, 2015 or January 1, 2030.

How are leap years handled?

The calculator uses actual calendar dates, so it accounts for leap years and each month's true length. For a February 29 birth date, February 28 is used as the anniversary in non-leap years.

Frequently Asked Questions

Enter your date of birth and calculate. The tool counts completed calendar years, months, and days.

Enter your birth date and leave Calculate age on set to today's date.

The age summary shows the exact number of calendar days between your birth date and the calculation date.

Choose a past or future date in the Calculate age on field before calculating.

Yes. It uses actual calendar dates, month lengths, and leap years.

In years without February 29, the calculator uses February 28 as the calendar anniversary.

No. Your dates are processed only in your browser and are not stored or uploaded.