# Inches to Millimeters – in to mm

Use this simple calculator to convert inches to millimeters. Place your inch value in the blank space, and the equivalent millimeters will show. You can also use our inches-to-millimeters formula to make the calculations yourself.

## Convert Inches(in) to Millimeters(mm)

Type a value in the Inches(in) field to convert the value to Millimeters(mm):

There are 25.4 millimeters in one inch. To convert from inches to millimeters, multiply your value by 25.4.

`Millimeters = inches x 25.4`

Reference the table below for common inches to millimeters conversions.

Inches(in) | Milimeters(mm) |
---|---|

1 in | 25.4 mm |

1.5 in | 38.09 mm |

2 in | 50.8 mm |

2.2 in | 55.88 mm |

3 in | 76.199 mm |

3.75 in | 95.25 mm |

4 in | 101.6 mm |

4.25 in | 107.94 mm |

5 in | 127 mm |

5.5 in | 139.7 mm |

6 in | 152.39 mm |

7.5 in | 190.5 mm |

8 in | 203.2 mm |

10 in | 254 mm |

10.5 in | 266.7 mm |

12 in | 50.8 mm |

13 in | 76.19 mm |

15 in | 381 mm |

16 in | 406.4 mm |

18 in | 2057.4 mm |

20 in | 508 mm |

25 in | 635 mm |

27 in | 685.8 mm |

30 in | 762 mm |

35 in | 889 mm |

40 in | 1016 mm |

48 in | 1219.19 mm |

50 in | 1270 mm |

80 in | 2032 mm |

100 in | 2540 mm |

200 in | 5080 mm |

300 in | 7620 mm |

## How to Convert Millimeters to Other Measurements

Use the formulas below to convert millimeters to other units.

A millimeter is equal to 1/10th of a centimeter. So, to go from millimeters to centimeters, divide your value by 10.

`Centimeters = millimeters ÷ 10`

A decimeter is 1/10 of a meter and the equivalent of 100 millimeters. To convert from millimeters to decimeters, divide by 100.

`Decimeters = millimeters ÷ 100`

There are 304.8 millimeters in one foot. To figure millimeters to feet, divide by 304.8.

`Feet = millimeters ÷ 304.8`

There are 1,000 millimeters in a meter. To convert from millimeters to meters, divide by 1,000.

`Meters = millimeters ÷ 1,000`

There are 914.4 millimeters in a yard. To figure millimeters to yards, divide by 914.4.

`Yards = millimeters ÷ 914.4`

## What is a Millimeter?

A millimeter (symbol: **mm)** is a unit of length from the metric system or International System of Units (SI). A millimeter is the smallest measurement on metric rulers and tape measures. One millimeter is one-tenth of a centimeter and 1/1000th of a meter.

Examples of a millimeter include the thickness of ten pieces of copy paper stacked on top of each other, the sharp point of a pencil, or the thickness of a driver’s license.

## Millimeter vs. Inch

An inch is an imperial unit used in the United States and the United Kingdom. An inch is 25.4 times larger than a millimeter. A millimeter is a standard unit of measurement for countries that use the metric system, which includes most of the world. Since the millimeter is so tiny, it allows for precise measurements.

## Frequently Asked Questions (FAQ)FAQ

### What’s the difference between a millimeter and a cubic millimeter?

A standard millimeter measures length, while a cubic millimeter measures volume (length x width x height.) A cubic millimeter is a cube in which all sides measure one millimeter.

### What’s the difference between a millimeter and a square millimeter?

A square millimeter measures area (length x width), while a standard millimeter only measures length. A square millimeter has four equal sides of one millimeter.

### How big is a micrometer compared to a millimeter?

One millimeter contains 1,000 micrometers. So, a micrometer is 1/1000th of a millimeter.

### How big is a nanometer compared to a millimeter?

There are 1,000,000 nanometers in a millimeter.

### When should you use millimeters to measure?

Use millimeters to measure very small objects less than one centimeter. Using millimeters allows for preciseness.