Age Calculator
Calculate your exact age in years, months and days from your date of birth — and see how long until your next birthday.
About the Age Calculator
Ever been asked how old am I in exact terms and paused to do the mental math? This age calculator removes the guesswork. Enter your date of birth and it instantly returns your precise age in years, months and days, along with your total months, weeks, days and hours lived.
It also works as a date-of-birth calculator for any reference date, so you can find out how old you were on a past event or will be on a future one. Everything runs in your browser, so your date of birth is never sent anywhere.
How to use the Age Calculator
- Select your date of birth using the date picker.
- Leave the calculate as of field on today, or pick a custom date to find your age on that day.
- Press Calculate Age.
- Read your exact age plus totals and the countdown to your next birthday.
How the calculation works
Broken into whole years, then remaining months, then remaining days
The calculator counts complete years first, then the leftover months, then the remaining days, correctly accounting for months of different lengths and leap years.
Example
Suppose you were born on 15 August 1996 and today is 15 June 2026.
- Completed years: 29
- Extra months: 10
- Extra days: 0
So your exact age is 29 years, 10 months — roughly 358 total months or about 10,896 days.