FREE ONLINE AGE CALCULATOR

Calculate your exact age in years, months and days. See total weeks lived and days until your next birthday. Free, instant, no signup.

Date of birth

Calculate age as of

Please enter your date of birth.

What is an Age Calculator?

An age calculator determines your exact age from your date of birth, accounting for leap years and the varying lengths of months. Unlike simply subtracting years, our tool calculates your precise age in years, months, and days.

How to Calculate Your Exact Age

Enter your date of birth using the date picker
The reference date defaults to today — change it if needed
Click Calculate My Age
View your exact age plus total months, weeks, and days
See how many days until your next birthday

Beyond Years: Months, Weeks and Days

Our calculator shows your age in multiple formats. Knowing you have lived 14,600 days is far more interesting than just knowing you are 40. Use it to discover interesting age milestones.

Fun Age Facts and Milestones

The average human lives approximately 4,000 weeks
At age 1 you have lived about 8,760 hours
People born on February 29 only have a "true" birthday every 4 years

Who Uses an Age Calculator?

Job applications requiring age eligibility verification
Medical forms needing precise age in years and months
Legal documents requiring exact age verification
Genealogy research calculating ages from historical records

Frequently Asked Questions

How accurate is this?+

Exact to the day, accounting for leap years and varying month lengths.

Can I calculate someone else's age?+

Yes. Enter any date of birth and any reference date.

Can I see my age in months or days?+

Yes. Results show total months, total weeks, and total days.

Does it work for past or future dates?+

Yes. Change the reference date field to any past or future date.

Why might my age differ?+

The calculator uses the exact calendar date. If your birthday has not occurred yet this year it shows last year's count.