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Calculating whether a year is a leap year is quite easy. You just need to do a few very simple calculations.

**Start selecting the year you want to count.**

**Calculate whether the year is divisible by 4 (the result of division without remainder).**If it is not divisible by 4, for example 1997, then the year is not a leap year. If it’s divisible by 4, like 2012, read on and continue.

**Divide the year by 100.**A year that is divisible by 4 but not by 100, for example 2012, is not a leap year. If the year you calculate is divisible by both 4 and 100, like 2000, you continue.

**Divide the year by 400.**A year that is divisible by 100 but not by 400, like 1900, is not a leap year. If it is divisible by both 100 and 400, the year is leap year. By such a calculation, the year 2000 is definitely a leap year.

- Leap years: 1600, 1604, 1608, 1612, 1616…1684, 1688, 1692, 1696, 1704 (1700 doesn’t leap, you know why?), 1708, 1712…1792, 1796, 1804 (non-leap year 1800), 1808, 1812…1892, 1896, 1904 (non-leap year 1900), 1908, 1912…1992, 1996, 2000 (2000 is a leap year again, you find out why right?), 2004, 2008, 2012…2092, 2096, 2104 (2100 non-leap year)…2196, 2204…2296, 2304…2396, 2400 (same reason), 2404…etc.
- All years divisible by 4 are leap years. A year has 365 days and 6 hours, or 365 and 1/4 days. Every four years these 6 hours add up to a day (6×4=24) and this is also the reason why every four years, February adds a 29th day.

wikiHow is a “wiki” site, which means that many of the articles here are written by multiple authors. To create this article, 15 people, some of whom are anonymous, have edited and improved the article over time.

This article has been viewed 9,249 times.

Calculating whether a year is a leap year is quite easy. You just need to do a few very simple calculations.

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