Age Calculator
Work out an exact age in years, months and days — plus the countdown to the next birthday.
Everything is calculated in your browser. Your date of birth is never sent to or stored on any server.
Results
How to use
Enter a date of birth. The age is calculated as of today by default; change the reference date to compute an age at any point in time — past or future. Alongside the exact age you get the total in months, weeks and days, the weekday of birth, and how long until the next birthday.
Examples
- Born 2000-02-29: in common years the birthday anniversary is counted on February 28, so on 2026-02-28 the exact age reads 26 years 0 months 0 days.
- Born 1990-07-26, on 2026-07-26 the age is exactly 36 years 0 months 0 days.
Frequently asked questions
How is “exact age” defined here?
It is the completed years, months and days between the birth date and the reference date — the same convention used on official documents in most countries. You turn a year older on your birthday, not on January 1.
What about people born on February 29?
In common years the next birthday is shown as February 28. The total-days figure is always exact regardless, because it counts real calendar days.
Is my date of birth uploaded anywhere?
No. This page is a static file; the calculation runs entirely in your browser and the date you enter is never transmitted or stored on a server.