## Centimeters-inches converter

Enter the length in either of the next two fields and get it converted instantly from cm to inches or the opposite, from inches to cm. The inches are printed both in decimal and fraction form.

Centimeters [cm]: | |||

Inches [in]: | |||

Inches can be decimal or fractional. For example: 5.5 or 5 1/2 | |||

Fraction [in]: | |||

Decimal [in]: | |||

Feet+inches: | |||

### Conversion Formulas

1 inch = 2.54 cm

1 cm ≈ 0.3937 inches ≈ 25/64 inches

#### Rule of thumb:

10 cm ≈ 4 inches

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## Definitions

#### Table of contents

### Unit of centimeter

Centimeter or centimetre [cm] is a unit of length from the SI system of units. It is defined as one hundredth (1/100) of the meter. The meter [m], is the base unit of length in SI system, defined as the distance traveled by light in vacuum in seconds.

Besides [cm], other multiple and fraction units of the metre are defined through the decimal SI prefixes, as shown in the table:

Unit | Symbol | [m] |
---|---|---|

Nanometer | nm | 10^{-9} |

Micrometer | μm | 10^{-6} |

Millimeter | mm | 0.001 |

Centimeter | cm | 0.01 |

Hectometer | hm | 100 |

Kilometer | km | 1000 |

Megameter | Mm | 10^{6} |

### Unit of inch

Inch [in] is a unit of length for the Imperial and US customary system of units. It was historically conceived as the length of 3 barley-corns. Today, it is defined through the meter SI unit as: 1 in = 0.0254 m (= 2.54 cm = 25.4 mm).

Multiple units of the inch are defined as shown in the table:

Unit | Symbol | [in] |
---|---|---|

Foot | ft | 12 |

Yard | yd | 36 |

Mile | mi | 63360 |

### How to convert inches to cm

- Multiply distance in [in] with 2.54
- The result is the distance in cm

For example to convert 20 inches to cm: cm

### How to convert cm to inches

- Divide distance in [cm] by 2.54
- The result is the distance in inches

For example to convert 50 cm to inches: inches

### Conversion chart - inches to cm

The following chart can be used to convert from inches to cm. A typical cell in the table gives the conversion in cm for X Y/Z inches, defined as:

- X (whole inches) given in the 1st cell of the row
- Y/Z (fractional part) given in column head

inch to cm | |||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|

0 | 1/16" | 1/8" | 3/16" | 1/4" | 5/16" | 3/8" | 7/16" | 1/2" | 9/16" | 5/8" | 11/16" | 3/4" | 13/16" | 7/8" | 15/16" | ||

0" | 0 | 0.159 | 0.318 | 0.476 | 0.635 | 0.794 | 0.953 | 1.11 | 1.27 | 1.43 | 1.59 | 1.75 | 1.91 | 2.06 | 2.22 | 2.38 | 0" |

1" | 2.54 | 2.7 | 2.86 | 3.02 | 3.17 | 3.33 | 3.49 | 3.65 | 3.81 | 3.97 | 4.13 | 4.29 | 4.45 | 4.6 | 4.76 | 4.92 | 1" |

2" | 5.08 | 5.24 | 5.4 | 5.56 | 5.71 | 5.87 | 6.03 | 6.19 | 6.35 | 6.51 | 6.67 | 6.83 | 6.99 | 7.14 | 7.3 | 7.46 | 2" |

3" | 7.62 | 7.78 | 7.94 | 8.1 | 8.26 | 8.41 | 8.57 | 8.73 | 8.89 | 9.05 | 9.21 | 9.37 | 9.53 | 9.68 | 9.84 | 10 | 3" |

4" | 10.2 | 10.3 | 10.5 | 10.6 | 10.8 | 11 | 11.1 | 11.3 | 11.4 | 11.6 | 11.7 | 11.9 | 12.1 | 12.2 | 12.4 | 12.5 | 4" |

5" | 12.7 | 12.9 | 13 | 13.2 | 13.3 | 13.5 | 13.7 | 13.8 | 14 | 14.1 | 14.3 | 14.4 | 14.6 | 14.8 | 14.9 | 15.1 | 5" |

6" | 15.2 | 15.4 | 15.6 | 15.7 | 15.9 | 16 | 16.2 | 16.4 | 16.5 | 16.7 | 16.8 | 17 | 17.1 | 17.3 | 17.5 | 17.6 | 6" |

7" | 17.8 | 17.9 | 18.1 | 18.3 | 18.4 | 18.6 | 18.7 | 18.9 | 19.1 | 19.2 | 19.4 | 19.5 | 19.7 | 19.8 | 20 | 20.2 | 7" |

8" | 20.3 | 20.5 | 20.6 | 20.8 | 21 | 21.1 | 21.3 | 21.4 | 21.6 | 21.7 | 21.9 | 22.1 | 22.2 | 22.4 | 22.5 | 22.7 | 8" |

9" | 22.9 | 23 | 23.2 | 23.3 | 23.5 | 23.7 | 23.8 | 24 | 24.1 | 24.3 | 24.4 | 24.6 | 24.8 | 24.9 | 25.1 | 25.2 | 9" |

10" | 25.4 | 25.6 | 25.7 | 25.9 | 26 | 26.2 | 26.4 | 26.5 | 26.7 | 26.8 | 27 | 27.1 | 27.3 | 27.5 | 27.6 | 27.8 | 10" |

11" | 27.9 | 28.1 | 28.3 | 28.4 | 28.6 | 28.7 | 28.9 | 29.1 | 29.2 | 29.4 | 29.5 | 29.7 | 29.8 | 30 | 30.2 | 30.3 | 11" |

12" | 30.5 | 30.6 | 30.8 | 31 | 31.1 | 31.3 | 31.4 | 31.6 | 31.8 | 31.9 | 32.1 | 32.2 | 32.4 | 32.5 | 32.7 | 32.9 | 12" |

0 | 1/16" | 1/8" | 3/16" | 1/4" | 5/16" | 3/8" | 7/16" | 1/2" | 9/16" | 5/8" | 11/16" | 3/4" | 13/16" | 7/8" | 15/16" | ||

1inch = 2.54cm **** 10 cm ≈ 4 in |

#### How to use the above chart

Let's say that we want to convert 3 ¼ inches to cm. First we select 3 whole inches by the respective row in the chart (row starting with 3"). Then, we look for the column having ¼ at its head. The selected cell has a value of 8.26. Therefore, we conclude that 3 ¼ inches are equal to 8.26cm.

### Conversion table from cm to inches

In the following table some typical distances in centimeters are converted to inches:

[cm] | [in] |
---|---|

0.1 | 0.03937 |

0.25 | 0.09843 |

0.5 | 0.1969 |

0.75 | 0.2953 |

1 | 0.3937 |

2 | 0.7874 |

3 | 1.181 |

5 | 1.969 |

10 | 3.937 |

12 | 4.724 |

20 | 7.874 |

30 | 11.81 |

40 | 15.75 |

50 | 19.69 |

### Conversion table from inches to cm

In the following table some typical distances in inches are converted to centimeters:

[in] | [cm] |
---|---|

0.125 | 0.3175 |

0.25 | 0.635 |

0.375 | 0.9525 |

0.5 | 1.27 |

1 | 2.54 |

2 | 5.08 |

3 | 7.62 |

5 | 12.7 |

10 | 25.4 |

12 | 30.48 |

20 | 50.8 |

30 | 76.2 |

50 | 127 |