Everyday life

Leap Year Calculator

Check whether a year is a leap year.

Calculated Output

Leap year? Yes

Days in year 366

Formula: divisible by 4, except centuries not divisible by 400

Step-by-Step Breakdown

1. Values used:

2. Year = 2,024

4. Leap year? = Yes

5. Days in year = 366

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The math behind it

A year is a leap year if divisible by 4 — but century years must also be divisible by 400 (so 1900 wasn't, 2000 was).

2024 → leap year (366 days).

Why the 400 rule?

It corrects the small over-count of the simple every-4-years rule.