Free Online Age Calculator
Enter a date of birth to see an exact age in years, months and days, plus a countdown to the next birthday.
- Exact to the day
- Next birthday countdown
- No sign-up needed
Why use our age calculator?
Accurate results, instantly, with nothing to install or sign up for.
Exact to the day
Age in years, months and days, with leap years and month lengths handled correctly.
Next birthday countdown
See the weekday of your next birthday and exactly how many days are left.
Fast and private
Everything runs in your browser. Your dates are never uploaded or stored.
How it works
Three quick steps.
Pick your birth date
Choose the date of birth using the date field above.
Choose a comparison date
Leave it as today, or set any other date to find the age on that day.
Get your result
Press Calculate to see age, total days, weeks, hours and your next birthday.
Frequently asked questions
Quick answers about how age is calculated.
How is age calculated?
We count complete years since the date of birth, then the remaining full months, then the leftover days up to the chosen date.
What if I was born on February 29?
In non-leap years the birthday is counted on March 1, so the countdown and progress bar still work correctly.
Can I find my age on a past or future date?
Yes. Change the “Age on this date” field to any date after your date of birth.
Is my data stored anywhere?
No. The calculation happens entirely in your browser and nothing is sent to a server.
Contact Us
Questions, feedback or business enquiries? We would love to hear from you.