Leap Year Checker
Check if a year is a leap year. Understand leap year rules and get explanations.
Local Processing
Files are not uploaded to any server. All operations are performed in your browser.
Leap Year Rules
- A year divisible by 4 is a leap year
- But if divisible by 100, it's NOT a leap year
- Unless also divisible by 400, then it IS a leap year
Enter Years
How to Use
- 1
Enter a year or multiple years.
- 2
Click 'Check' to see results.
- 3
View leap year status with explanation.
- 4
Understand the leap year rules applied.
- 5
Copy results if needed.
Use Cases
Calendar Planning
Verify leap years for calendar applications and date calculations.
Educational
Learn about leap year rules and why they exist.
Batch Checking
Check multiple years at once to find all leap years in a range.
FAQ
How do I check leap years?▾
Enter one or more years separated by spaces, commas, or newlines. The tool will check each year and explain why it is or isn't a leap year.