Convert inches to milimeters (in to mm)
by typing the amount of inches in the input field below and then clicking in the "**Convert**" button.
If you want to convert from milimeters to inches, you can use our
milimeter to inch converter.

Formula used to convert *in* to *mm*:

For example, if you want to convert 1 *in* to *mm*, just replace **x** by **1** [in]:

- Multiply the amount of inches by 25.4.
- The result will be expressed in milimeters.

The following table will show the most common conversions for Inches (in) to Milimeters (mm):

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

0.001 in | 0.0254 mm |

0.01 in | 0.254 mm |

0.1 in | 2.54 mm |

1 in | 25.4 mm |

2 in | 50.8 mm |

3 in | 76.19999999999999 mm |

4 in | 101.6 mm |

5 in | 127 mm |

6 in | 152.39999999999998 mm |

7 in | 177.79999999999998 mm |

8 in | 203.2 mm |

9 in | 228.6 mm |

10 in | 254 mm |

20 in | 508 mm |

30 in | 762 mm |

40 in | 1016 mm |

50 in | 1270 mm |

60 in | 1524 mm |

70 in | 1778 mm |

80 in | 2032 mm |

90 in | 2286 mm |

100 in | 2540 mm |

How many milimeters are in a inch? **1 inch [in]** is **equal** to **25.4 milimeters [mm]**.

Note that this is a **high-precision** in to mm calculator, but rounding errors may occur (in a very small percentage of the cases).

Convert inches to milimeters (in to mm) by pasting or typing the amount of inches in the inches input. Check the formula section to manually convert **in** to **mm**.

The **inch**, abbreviated as **in** (or denoted with the symbol **"**) is a unit of length in the British imperial and United States customary systems of measurement.

One inch is to 1/12 of a foot, or 1/36 yard. Since the adoption of the international yard, the yard has been based on the metric system and defined as exactly 25.4 mm.

The **millimetre** (also spelled as **millimeter** in the United States), is a unit of length in the metric system equal to one thousandth of a metre. Therefore, there are one thousand millimetres in a metre.

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Inch to Milimeter converter is a free and online calculator that converts Inches to Milimeters.

- Either copy and paste or type the amount of inches to convert in the inches input.
- Click on the
**Convert**button. - It will convert inches into milimeters and output it in the milimeters input.

All mayor web browsers are supported, including Internet Explorer, Microsoft Edge, Firefox, Chrome, Safari and Opera.

Inch to Milimeter converter calculator works in any device that supports any of the browsers mentioned before. It can be a smartphone, desktop computer, notebook, tablet, etc.