Leap Year Calculator - Check & Calculate Leap Years

Determine if any year is a leap year, find leap years in ranges, and understand the complex rules with detailed explanations.

Leap Year Rules

1
Divisible by 4
2024 ÷ 4 = 506 ✓
Status: Required
2
NOT divisible by 100
2024 ÷ 100 = 20.24 ✓
Status: Exception
3
EXCEPT if divisible by 400
2000 ÷ 400 = 5 ✓
Status: Override

Calculation Results

Enter values and click Calculate to see results

Leap Year Facts

• The concept of leap years dates back to 45 BCE with Julius Caesar
• People born on February 29 are called "leaplings" or "leapers"
• The chance of being born on a leap day is about 1 in 1,461
• Some cultures consider leap years unlucky for marriages
• The Gregorian calendar skips 3 leap years every 400 years

Calulate a leap year with our Leap Year Calculator for finding out whether or not any year is a leap year, to find all leap years within a range of years, or to simply create a list of leap years over centuries of time. Whether you simply would like to find out if a birthday is a leap year, or you would like to calculate age differences, on a leap year age calculator you will get quick, accurate results.

Leap Year Calculator

What is a Leap Year?

A leap year is a year that has 366 days, instead of 365, with February getting an extra day. The purpose of leap years is to keep the calendar in sync with the Earth's rotation around the Sun, and to keep our seasons from drifting over time.

Our Leap Year Calculator will help you:

Check if a given year is a leap year or not.
Find all leap years between two years.
Create a list of leap years for however many years you would like.
Understand the rules and calculations of leap years easily.

How the Leap Year Calculator Works

The Leap Year calculator operates under the rules of the Gregorian calendar to determine leap years:

1.
The year must be divisible by 4.
2.
The year is not a leap year if it is also divisible by 100.
3.
If the year is divisible by 400, then it is a leap year.

For example:

2028 ÷ 4 = 507 → Leap Year
2100 ÷ 100 = 21 → Not a Leap Year
2000 ÷ 400 = 5 → Leap Year

The Find in Range mode allows you to list all of the leap years between 1900 - 2100, or any range of years that you choose. It is a useful tool for historians, teachers, developers, and for those who are simply interested in the patterns formed in calendars.

Leap Year Age Calculator

Our integrated Leap Year Age Calculator can give you your exact age when taking leap days into account. This is helpful because this calculator can yield far more exact ages than a regular age calculator, which will be especially helpful for anyone born on February 29.

You simply write in your birthdate and the current year, and all of your leap years/ages will be calculated for you. You can even use the calculator to compare ages, timelines, and which birthdays are actually leap days.

Leap Year Birthday Calculator

If you were born on February 29, our Leap Year Birthday Calculator will show you:

The next leap year coming up
How many leap birthdays you've had
How many years until your next birthday on February 29

This is a fun and accurate way to celebrate your leap year birthday, track other milestone dates, or plan for the next big gathering!

Why use SantPro Tool' Leap Year Calculator?

1.
100% accurate based on Gregorian calendar rules
2.
Fast, real-time results with easy-to-read explanations
3.
Find leap years in any range instantly
4.
Supports leap year birthday and leap year age calculations
5.
Visually shows leap and common years for clarity
6.
Educational and perfect for both personal and academic use

Whether you're checking historical leap years, planning events, or curious about leap day birthdays - our Leap Year Calculator is the simplest and most powerful tool online.

The Leap Year Calculator by SantPro Tools is your one-stop shop for all things leap year, age, and birthday calculations. It is quick, reliable, and developed for everybody, including students and their teachers, developers, and people who like calendars.

Try the Leap Year Calculator today and explore the wonderful world of leap years with confidence and fun.

FAQs

Enter any year in the Leap Year Calculator, and it will instantly tell you if it is a leap year and what the previous and next leap years were.

The leap years from 2000 to 2030, according to our calculator, are: 2000, 2004, 2008, 2012, 2016, 2020, 2024, and 2028.

The Leap Year Calculator uses the official Gregorian calendar leap year formula, which is: divisible by 4, not divisible by 100, unless also divisible by 400.

A Leap Year Age Calculator determines your age including the days of leap year, making it a perfect tool for accurately determining a difficult time or age.

Yes! The Leap Year Birthday Calculator will show how many leap birthdays you had, and when that will be again.

February 29 happens on the 4th year, but does not happen on the century years unless it is also divisible by 400.