inch to millimeter Converter

in = mm

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

Handy tools for this on Amazon
Digital calipers →25 ft tape measure →Steel ruler set (in/cm) →

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Common conversions

1 in25.4 mm
5 in127 mm
10 in254 mm
20 in508 mm
50 in1270 mm
100 in2540 mm