Leap Year Checker
Check if a year is a leap year and find the next one.
How it works
A year is a leap year if it divides by 4, except years divisible by 100 are not, unless they also divide by 400. So 2024 and 2000 are leap years, while 1900 and 2100 are not. The extra day keeps the calendar in step with Earth's orbit.
FAQ
Is this calculator free?
Yes. No signup is needed and nothing you enter is stored.
Is the result exact?
Results are rounded for display. For financial, medical, or legal decisions, confirm with a professional.
Do my numbers leave my device?
No. The calculation runs in your browser.