New

Age Calculator

Calculate your exact age in years, months, and days. Find out total days lived, weeks, and days until your next birthday.

Enter your date of birth and an optional target date to calculate your exact age

Date of Birth

Target Date

Your Age

Select your birth date to calculate

Age is calculated based on calendar dates. The target date defaults to today but can be changed to calculate age at any point in time.

How to Use This Tool

1
Enter your date of birth
Use the date picker to select your birth date. The format follows your browser's locale settings.
2
Optionally change the target date
By default the target date is today. Change it to calculate age at any specific date in the past or future.
3
View your exact age
The calculator displays your age in years, months, and days, along with total days, weeks, and months lived.
4
Check your next birthday
See how many days remain until your next birthday countdown, displayed automatically below the result.

How does the age calculator determine exact age?: It computes the difference between the birth date and target date accounting for varying month lengths and leap years, giving you precise years, months, and days.
Can I calculate age between two arbitrary dates?: Yes. Change both the birth date and target date fields to compute the elapsed time between any two dates, not just from birth to today.
Does this tool account for leap years?: Absolutely. The calculation correctly handles leap years and months with different numbers of days to ensure accurate results.
How is the next birthday countdown calculated?: It finds the next occurrence of your birth month and day after the target date and counts the remaining calendar days.