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Date & Time
Leap Year Calculator
A year is a leap year if it is divisible by four, except for century years, which must be divisible by 400. That rule keeps the calendar aligned with the seasons to within a day every 3,200 years.
How it works
Year
Days in the year
Days in February
Rule test โ divisible by 4
Next leap year
Frequently asked questions
How do I use the Leap Year Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.