Age Calculator

A job application asking for exact age, a form requiring years-months-days rather than just a birth year, or simple curiosity about a milestone birthday coming up — this calculator works out precise age from a date of birth, down to the day.

How the calculation handles month and day differences

Age isn't just "this year minus birth year" — if your birthday hasn't happened yet this year, a full year hasn't actually passed. This calculator accounts for that properly, checking the exact month and day against today's date so someone born in November calculating their age in March gets an accurate count of years, months, and days rather than an inflated year count.

Where exact age matters

Checking eligibility for an age-restricted service, scholarship, or government scheme that specifies a precise age requirement. Filling out official forms, visa applications, or medical intake forms that ask for age in years and months rather than just years. Satisfying simple curiosity about exactly how many days old you or someone else is, often used for birthday countdowns or milestone celebrations (like a 10,000-day birthday).

Frequently Asked Questions

Does it account for leap years correctly? Yes — the calculation is based on actual calendar dates, so leap years are automatically factored into both the years/months/days breakdown and the total day count.

Can I calculate age as of a specific past or future date instead of today? Currently the calculator compares your date of birth to today's date; for age as of another date, you'd need to manually adjust or use a general date-difference tool.

Is my date of birth stored or sent anywhere? No — the entire calculation happens locally in your browser using JavaScript; nothing is saved or transmitted.