Age Calculator
Calculate your exact age in years, months, and days.
100% client-side — your data never leaves your browser.
About the Age Calculator
Calculate your exact age down to the day. Enter your date of birth and instantly see your age in years, months, and days, the total number of days you've been alive, and a live countdown to your next birthday.
How to use the Age Calculator
- 1Pick your date of birth from the date input.
- 2Your exact age in years, months, and days appears instantly.
- 3Check the total days lived and weeks lived stats.
- 4See how many days remain until your next birthday.
Why use our Age Calculator
Precise breakdown
Get your age split into years, months, and days — not just a rounded number.
Days lived
See exactly how many days, weeks, and hours you've been alive.
Next birthday
A live countdown shows how many days until you celebrate again.
100% private
Your date of birth never leaves your browser — nothing is uploaded or stored.
Frequently asked questions
How is my exact age calculated?+
We count full calendar years from your birthday, then the remaining full months, then the remaining days — the same way you'd say it out loud (e.g. 32 years, 4 months, 12 days).
Does the calculator account for leap years?+
Yes. Calculations use the native JavaScript Date object, which handles leap years and varying month lengths automatically.
Is my date of birth saved anywhere?+
No. Everything happens in your browser. Your date of birth is never sent to a server, logged, or stored after you close the tab.
Can I calculate the age between two dates?+
This tool calculates your age as of today. To compare two arbitrary dates, set your computer's date or use it as a reference for the structure of the calculation.