### Inch

**Definition:** An inch (symbol: in) is a unit of length in the imperial and US customary systems of measurement. An inch was defined to be equivalent khổng lồ exactly 25.4 millimeters in 1959. There are 12 inches in a foot & 36 inches in a yard.

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**History/origin:** The term "inch" was derived from the Latin unit "uncia" which equated khổng lồ "one-twelfth" of a Roman foot.

There have sầu been a number of different standards for the inch in the past, with the current definition being based on the international yard. One of the earliest definitions of the inch was based on barleycorns, where an inch was equal to the length of three grains of dry, round barley placed end-to-kết thúc. Another version of the inch is also believed to have been derived from the width of a human thumb, where the length was obtained from averaging the width of three thumbs: a small, a medium, và a large one.

**Current use:** The inch is mostly used in the United States, Canadomain authority, và the United Kingdom. It is also sometimes used in Japan (as well as other countries) in relation to electronic parts, like the kích cỡ of display screens.

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### Centimeter

**Definition:** A centimeter (symbol: cm) is a unit of length in the International System of Units (SI), the current khung of the metric system. It is defined as 1/100 meters.

**History/origin:** A centimeter is based on the SI unit meter, and as the prefix "centi" indicates, is equal to lớn one hundredth of a meter. Metric prefixes range from factors of 10-18 lớn 1018 based on a decimal system, with the base (in this case the meter) having no prefix and having a factor of 1. Learning some of the more commonly used metric prefixes, such as kilo-, mega-, giga-, tera-, centi-, milli-, micro-, & nano-, can be helpful for quickly navigating metric units.

**Current use:** The centimeter, lượt thích the meter, is used in all sorts of applications worldwide (in countries that have undergone metrication) in instances where a smaller denomination of the meter is required. Height is commonly measured in centimeters outside of countries like the United States.

Centimeter

### Inch to Centimeter Conversion Table

Inch0.01 in | 0.0254 cm |

0.1 in | 0.254 cm |

1 in | 2.54 cm |

2 in | 5.08 cm |

3 in | 7.62 cm |

5 in | 12.7 cm |

10 in | 25.4 cm |

đôi mươi in | 50.8 cm |

50 in | 127 cm |

100 in | 254 cm |

1000 in | 2540 cm |

### How to lớn Convert Inch khổng lồ Centimeter

1 in = 2.54 cm1 centimet = 0.3937007874 in