Inches to MM Converter

Convert inches to millimeters (in to mm) instantly with our free online converter. Accurate results for engineering, manufacturing, and precise measurements. Includes conversion table.

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How to convert inches to millimeters?

To convert inches to millimeters, multiply the number of inches by 25.4. This is because 1 inch equals 25.4 millimeters.

d(mm) = d(in) × 25.4

Example

Convert 10 inches to millimeters:

d(mm) = 10in × 25.4 = 254mm

How many millimeters in an inch?

There are 25.4 millimeters in one inch.

1in = 25.4mm

How many inches in a millimeter?

There are 0.0393701 inches in one millimeter.

1mm = 0.0393701in

What is an Inch?

An inch is a unit of length in the imperial and US customary systems of measurement. It is equal to 1/12 of a foot or 1/36 of a yard. The inch is commonly used in the United States, Canada, and the United Kingdom for measuring height, distance, and other dimensions.

What is a Millimeter?

A millimeter is a unit of length in the metric system, equal to 1/1000 of a meter. It is commonly used for precise measurements in engineering, manufacturing, and scientific applications.

Popular inches to millimeters conversion table

Inches (in)Millimeters (mm)
0.1 in2.54 mm
0.5 in12.7 mm
1 in25.4 mm
2 in50.8 mm
3 in76.2 mm
4 in101.6 mm
5 in127 mm
6 in152.4 mm
7 in177.8 mm
8 in203.2 mm
9 in228.6 mm
10 in254 mm
20 in508 mm
30 in762 mm
40 in1016 mm
50 in1270 mm
60 in1524 mm
70 in1778 mm
80 in2032 mm
90 in2286 mm
100 in2540 mm