Convert Millimeters to Inches

Millimeters → Inches
mm × 0.03937008 = in in × 25.4 = mm

To convert millimeters (mm) to inches (in), multiply the millimeters value by 0.03937008. 1 mm = 0.03937008 in, and 1 in = 25.4 mm. The conversion is a linear scaling with no offset, so the same factor applies to any value.

Going the other way? Convert in to mm.

mm to in table
Millimeters (mm) Inches (in)
0.1 mm 0.003937008 in
0.5 mm 0.01968504 in
1 mm 0.03937008 in
2 mm 0.07874016 in
5 mm 0.1968504 in
10 mm 0.3937008 in
20 mm 0.7874016 in
50 mm 1.968504 in
100 mm 3.937008 in
500 mm 19.68504 in
1000 mm 39.37008 in
Common linear distance ranges
Typical real-world values (mm)
Application Typical range
Precision positioning stroke 1 – 50 mm
Linear actuator stroke 50 – 500 mm
Gantry axis travel 500 – 5,000 mm
Long-travel transport 5,000 – 50,000 mm