Leap Year Calculator
Check whether a year is a leap year, its February length, and the nearest leap years.
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Leap Year Calculator
Check leap years, February days and nearby leap years.
Start Your Calculation
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Calculation Result
CalculatedHow to use the Leap Year Calculator
- Enter a whole year between 1600 and 9999.
- Click Calculate.
- Read whether it is a leap year, February days, and nearby leap years.
How does this calculator work?
Gregorian leap-year rule: a year divisible by 4 is a leap year, except century years divisible by 100, unless also divisible by 400. As a result, 1900 was not a leap year but 2000 was. This tool applies the modern Gregorian calendar rule to the supported year range.
Calculation example
2024 is divisible by 4 and not by 100, so it has February 29. The year 1900 had only 28 February days; 2000 had 29.
Frequently asked questions
Is 1900 a leap year?
No. Century years must be divisible by 400, and 1900 is not.
Is 2000 a leap year?
Yes. It is divisible by 400.
How many days are in a leap year?
366 days, because February has 29 days.
Is every fourth year a leap year?
Not exactly. Most are, but century-year exceptions apply.
What year range does the calculator support?
Whole Gregorian years from 1600 to 9999.