Free Age Calculator Online
Enter your birth date to calculate your exact age in years, months, and days with additional statistics.
Key Features
Everything you need in one free tool
Precise age to the day, accounting for leap years and varying month lengths.
See total days, total weeks, the weekday you were born, and your birthday countdown.
browser-side workflows is done locally in your browser. No personal data is shared.
About This Tool
An age calculator finds the exact time between a birth date and a target date, expressed in years, months, and days rather than a single rounded number. Because months differ in length and leap years add a day every four years, a precise age needs calendar-aware arithmetic, not a simple division of total days by 365.
The tool counts complete years first, then remaining whole months, then the leftover days, which matches how people naturally state an age. It also handles the leap-day edge case for people born on 29 February, and lets you set any reference date so you can work out an age as of a future or past event, not only today.
One subtlety worth knowing is how age is counted across a leap day: someone born on 29 February technically has a birthday only every four years, so tools differ on whether to treat their non-leap-year birthday as 28 February or 1 March. This calculator counts complete calendar units, which matches how age is stated legally and in everyday life.
How to Use It
- Enter the date of birth.
- Optionally set a reference date (it defaults to today).
- See the age broken down into years, months, and days, plus the total in days if you need it.
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