Inches (in) to Milimeters (mm) calculator

Input the amount of inches you want to convert to milimeters in the below input field, and then click in the "Convert" button. But if you want to convert from milimeters to inches, please checkout this tool.


Formula used to convert in to mm:

F(x) = x * 25.4

For example, if you want to convert 15 in to mm, just replace x by 15 [in]:

15 in = 15*25.4 = 381.0 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 76.2 mm
4 in 101.6 mm
5 in 127 mm
6 in 152.4 mm
7 in 177.8 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 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.

See also

FAQs for Inch to Milimeter calculator

What is Inch to Milimeter calculator?

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

How do I use Inch to Milimeter?

You just have to insert the amount of Inches you want to convert and press the "Convert" button. The amount of Milimeters will be outputed in the input field below the button.

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 work on?

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