Age Calculator

Find your exact age in years, months, weeks, days, hours, and minutes from your date of birth. Also shows how many days until your next birthday.

Enter dates

Date of birth

Age at date (defaults to today)

How the age calculator works

Enter your date of birth

Select your exact date of birth from the date picker. The calculator defaults to a date 25 years ago and today as the target date, so you can see results immediately.

Set the target date

This defaults to today but can be changed to any date — useful for calculating how old someone will be on a future date, or how old they were on a past date.

View your exact age

Your age is shown in years, months, weeks, days, hours, and minutes. The birthday countdown also shows exactly how many days until your next birthday.

The calculator works by subtracting your date of birth from the target date, accounting for varying month lengths and leap years. The exact breakdown (years, months, days) handles edge cases like birthdays that fall at the end of months correctly.

To find out how old someone will be on a specific future date — such as a retirement date or milestone birthday — simply change the target date field to that date.