Leap Year Checker
Fill in the value and the answer updates as you type.
How the Leap Year Checker 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.
Inputs and results
The Leap Year Checker takes 1 input and gives 3 results.
What you enter
- Year — starts at 2028.
What you get
- Leap year?
- Days in February
- Next leap year
Example: Leap Year Checker with the starting values
With year 2028, the calculator returns:
| Leap year? | Yes, a leap year (366 days) |
|---|---|
| Days in February | 29 |
| Next leap year | 2032 |
Change any value above and the results update straight away.
Leap Year Checker FAQ
How do I use the Leap Year Checker?
Enter year in the fields, then read leap year?, days in february and next leap year in the result panel. The answer updates as you type, and you can press Calculate or Enter to refresh it. Use “Copy link” to share your exact numbers with someone else.
What does the Leap Year Checker calculate?
Check if a year is a leap year and find the next one. It returns leap year?, days in february and next leap year from the 1 value you provide.
What values does the Leap Year Checker start with?
It opens with year 2028 so you can see a working result straight away. Replace them with your own numbers, or press Reset to return to these starting values.
Is the Leap Year Checker free and private?
Yes. It is free, needs no account, and runs in your browser, so nothing you type is sent to or stored on our servers. See the Privacy Policy for details.
Can I rely on the Leap Year Checker for important decisions?
Treat the result as a well-rounded estimate. Real situations often have details a general calculator cannot know, so confirm important decisions with a qualified professional. See the Disclaimer for more.