Inch to Milimeter calculator (in to mm)

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:

F(x) = x * 25.4

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

1 in = 1 * 25.4 = 25.4 mm


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

Inch to Milimeter Conversion Table

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

About the converter

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.

About Inches (in)

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.

About Milimeters (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.

FAQs for Inch to Milimeter converter calculator

What is Inch to Milimeter converter calculator?

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

How do I use Inch to Milimeter converter?

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

Which browsers are supported?

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

Which devices does Inch to Milimeter converter work on?

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.