How to Convert Millimeters to Inches Converting millimeters to inches is straightforward using a simple multiplication factor. The metric system and imperial system have a fixed conversion ratio. The Mathematical Formula To convert millimeters to inches, multiply the millimeters by 0.0393701 (or divide by 25.4): Inches = Millimeters � 0.0393701 Millimeters to Inches Conversion Table Millimeters (mm) Inches (in) Common Use Case 1 mm0.039 inSmall measurements 25.4 mm1 inExact equivalence 304.8 mm12 in (1 ft)One foot 1000 mm39.37 inOne meter 1700 mm66.93 inAverage height Frequently Asked Questions What is 1 mm in inches? 1 millimeter equals 0.0393701 inches. How do I convert mm to inches? Multiply the number of millimeters by 0.0393701, or divide by 25.4.
