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Leap Year Calculator

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Check whether any year is a leap year, and see the nearest leap years before and after it.

Leap Year Calculator

Live
Is 2026 a leap year?
No
Previous leap year
2024
Next leap year
2028

The leap year rule

A year is a leap year if: divisible by 4, AND (not divisible by 100, OR divisible by 400)
Example

2024 is a leap year (divisible by 4, not by 100). 2100 will NOT be a leap year (divisible by 100 but not by 400) - a common surprise, since most divisible-by-4 years are leap years, but century years follow a stricter rule.

Step-by-step guide

  1. Enter any year.
  2. Read whether it's a leap year, plus the nearest leap years before and after.

Common mistakes

Assuming every year divisible by 4 is a leap year - century years (like 1900 or 2100) are an exception unless also divisible by 400.
Forgetting the year 2000 was a leap year - it's divisible by 400, satisfying the exception to the "no century years" rule.

Frequently asked questions

Why do we need leap years at all?

Earth's orbit around the sun takes about 365.24 days, not exactly 365. Adding a leap day roughly every 4 years keeps the calendar in sync with the seasons over long periods.

Is the year 2000 a leap year?

Yes - even though it's a century year, it's also divisible by 400, which makes it a leap year under the full rule.

Will 2100 be a leap year?

No - 2100 is divisible by 100 but not by 400, so it will be skipped as a leap year despite being divisible by 4.

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