Leap Year CheckerMath
Check if any given year is a leap year according to the Gregorian calendar.
Result
Common year
2026 has 365 days.
Capabilities & How-To Guide
Instructions, supported options, and client-side privacy guarantee.
Show GuideHide Guide
Capabilities & How-To Guide
Instructions, supported options, and client-side privacy guarantee.
Show GuideHide Guide
A Leap Year is a calendar year that contains an additional day—February 29th—added to keep the calendar year synchronized with the astronomical year or seasonal year.
The Rules of Leap Years:
1
Divisible by 4
Most years that are divisible by 4 are leap years.
2
The 100 Year Exception
If a year is divisible by 100, it is NOT a leap year...
3
The 400 Year Exception
...unless it is also divisible by 400. Then it IS a leap year.
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