How are leap days handled?

If you were born on Feb 29, the calculator shows your birthday as Feb 28 in non-leap years (legal convention in most countries). You can switch to March 1 in the settings.

Is my date of birth stored?

No — the calculation runs entirely in your browser. Nothing is sent to our servers or saved to any history.

Why is my age different from a quick "current year − birth year" estimate?

Because the calculator checks whether your birthday has already happened this year. If not, your age is one less than year − year.

What's my zodiac sign?

The calculator shows your Western zodiac sign, Chinese zodiac animal, and birthstone alongside the age figures.

Age Calculator — Free Online Tool

What is the Age Calculator?

The Age Calculator is a free online calculator tools from Markvibe. Calculate exact age in years, months, days. It runs entirely in your browser — your data never gets uploaded — and works on desktop, tablet and mobile with no sign-up.

Reviewed by The Markvibe Team · Last updated 2026-06-28

Example

A worked example so you know exactly what to expect.

Input

(your input goes here)

Output

(the Age Calculator runs in your browser and shows the result instantly)

How to use Age Calculator

1Pick your date of birth from the calendar (or type it directly).
2Optionally set the "as of" date — today by default, useful for figuring out someone's age on a specific past or future date.
3Read your age in years, months and days, plus total weeks, days, hours, minutes and seconds lived.
4See your next birthday with a live countdown, and which day of the week you were born on.
5Switch to comparison mode to compute the exact age difference between two people.