ConvCalc App Store Inches to millimeters (inches to mm)
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mm
Multiply the number of inches by 25.4.
An inch is defined as exactly 25.4 millimeters. A millimeter is one thousandth of a meter.
Inches to millimeters chart
1 in25.4 mm
2 in50.8 mm
3 in76.2 mm
5 in127 mm
10 in254 mm
15 in381 mm
20 in508 mm
25 in635 mm
30 in762 mm
40 in1,016 mm
50 in1,270 mm
75 in1,905 mm
100 in2,540 mm
150 in3,810 mm
200 in5,080 mm
500 in12,700 mm
Worked example
A cable that is 12 inches long is 304.8 millimeters.
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