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Age Calculator — How Old Am I in Years, Months & Days

Enter your date of birth and get your exact age in years, months and days — plus total days alive and a live countdown to your next birthday.

Age is more than one number. This calculator breaks your life into years, months and days — then answers the fun questions: how many days have you been alive, and how long until your next birthday?

It runs entirely in your browser with your device's own date engine, so leap years and month lengths are handled exactly. Nothing you enter is uploaded or stored.

How age is calculated: completed years, not rounding

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The leap-day birthday: February 29

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Frequently asked

How do I calculate my exact age?

Enter your date of birth and the calculator shows your age in years, months and days — calendar-exact, including leap days.

How many days old am I?

The result panel shows your total days alive alongside the age breakdown. Born yesterday? That's 1 day.

When is my next birthday?

The calculator counts down the days until your next birthday. If today is your birthday, it shows 0 — happy birthday!