Leap Year Checker

Check whether any year is a leap year.

Runs entirely in your browser. Your data is never uploaded.

About Leap Year Checker

Leap Year Checker tells you instantly whether a given year is a leap year and explains why, using the standard Gregorian rules.

What makes a leap year?

Divisible by 4, except centuries unless divisible by 400.

Calculate your exact age in years, months and days.

Find the days, weeks and months between two dates.

Count down live to any future date and time.

Count words, characters, sentences and paragraphs in real time.