Inches to Millimeters

1 in = 25.4 mm

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How to convert inches to millimeters

One inch equals 25.4 millimeters. To convert inches to millimeters, multiply by 25.4.

mm = in × 25.4

Or divide by 0.03937007874. Example: 5 in × 25.4 = 127 mm.

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Related conversions

Inches to millimeters chart

InchesMillimeters
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
12 in304.8 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
250 in6,350 mm
500 in12,700 mm
1,000 in25,400 mm