Age calculator
Exact age in years, months, and days — plus your age in total days and the countdown to your next birthday.
Age calculation follows the everyday convention: you turn a year older on each birthday, and months are counted against actual month lengths (born January 31 → one month old on the last day of February, not March 2). Everything runs in your browser; no dates are sent anywhere.
Frequently asked questions
How is my exact age calculated?
Your age is the number of completed years since your birth date, plus the completed months and days since your last birthday. Someone born February 29 has their legal birthday on March 1 in non-leap years in most jurisdictions.
How many days old am I?
The calculator also shows your age as a total number of days — the count of calendar days from your birth date to today.
When is my next birthday?
The result includes a live countdown of days until your next birthday, computed from your local date.