How to convert millimeters to inches
Divide millimeters by 25.4 to get inches. Or multiply inches by 25.4 to get millimeters. Enter a value in either field and the conversion updates instantly.
Millimeters to inches reference
1 mm = 0.03937 in, 10 mm = 0.3937 in, 25.4 mm = 1 in, 50 mm = 1.9685 in, 100 mm = 3.937 in, 300 mm = 11.811 in, 1000 mm = 39.37 in.
FAQ
How many millimeters are in an inch?
There are exactly 25.4 millimeters in one inch. This is the official definition established by the international yard and pound agreement in 1959.
When would I need to convert mm to inches?
Common uses include reading engineering drawings, comparing product dimensions between metric and imperial specifications, woodworking, and 3D printing where models may be measured in either system.