Leap Year Calculator
Check whether any year is a leap year with this free online leap year calculator. Instantly find the number of days in the year, days in February, and the previous and next leap years.
Use this tool as a leap year checker, leap year finder, or to quickly answer "Is this year a leap year?"
Check a Leap Year
Enter a year to get instant results.
What Is a Leap Year Calculator?
A leap year calculator is an online tool that checks whether a particular year is a leap year. In the Gregorian calendar, a normal year has 365 days, while a leap year has 366 days.
The extra day is added to February, giving February 29 days. This calculator makes it easy to check a year without manually applying the leap year rules.
What Can This Leap Year Calculator Calculate?
Get the important calendar information you need from any year.
Leap Year Status
Quickly determine whether the selected year is a leap year.
Days in the Year
Find out whether the year contains 365 or 366 days.
February Days
See whether February contains 28 or 29 days.
Previous Leap Year
Find the previous leap year associated with the selected year.
Next Leap Year
Find the next leap year after the year you enter.
Instant Results
Get the result immediately after entering a valid year.
How to Use the Leap Year Calculator
Enter a Year
Enter the year you want to check in the calculator.
Check the Year
Select Check Leap Year to process the year.
View Your Result
See the leap year status and additional calendar information.
How Is a Leap Year Determined?
The Gregorian calendar follows specific rules for determining whether a year is a leap year. A year is generally a leap year when it is evenly divisible by 4.
The Leap Year Rule
Examples:
2024 is a leap year because it is divisible by 4. 1900 is not a leap year because it is divisible by 100 but not by 400. 2000 is a leap year because it is divisible by 400.
Common Uses for a Leap Year Calculator
Knowing whether a year contains 365 or 366 days can be useful in many everyday and technical situations.
Calendar Planning
Check whether February has 28 or 29 days when planning dates and calendar events.
Date Calculations
Determine whether a year has 365 or 366 days when working with date and duration calculations.
Education
Learn how the Gregorian calendar determines leap years using divisibility rules.
Programming and Software
Developers can use leap year rules when working with calendar and date-related calculations.
Important Information About Leap Years
A normal Gregorian calendar year contains 365 days. A leap year contains 366 days because one additional day is added to February.
Leap years help keep the calendar aligned with the Earth's annual cycle. The Gregorian calendar therefore uses the divisibility rules described above rather than simply adding a day every four years without exception.
Leap Year Calculator FAQs
What is a leap year?
A leap year is a year containing 366 days instead of the usual 365 days. The extra day is added to February, making February 29 days.
How do I check if a year is a leap year?
Enter the year into this calculator and select Check Leap Year. The calculator will display the result and additional information about the year.
Is 2024 a leap year?
Yes. 2024 is a leap year and contains 366 days. February has 29 days in 2024.
How many days are in a leap year?
A leap year has 366 days, while a normal year has 365 days.
How many days does February have in a leap year?
February has 29 days during a leap year. In a normal year, February has 28 days.
Why is 1900 not a leap year?
Although 1900 is divisible by 4, it is also a century year and is not divisible by 400. Under the Gregorian calendar rules, it is therefore not a leap year.
Is 2000 a leap year?
Yes. 2000 is a leap year because it is divisible by 400.
Is this leap year calculator free?
Yes. The calculator is free to use and provides instant leap year results.
Check Any Year for a Leap Year
Enter a year and instantly find out whether it is a leap year, how many days it contains, and when the nearby leap years occur.
Check Leap Year