Inches to MM Converter

Convert inches to millimeters (in to mm) instantly with our free online converter.

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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 in 2.54 mm
0.5 in 12.7 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