100mm in Inches: 100 Millimeters = 3.94 Inches
Quick Answer Box What is 100mm in Inches? 100mm is equal to 3.937 inches, which most people round to 3.94 inches. The millimeter (mm) belongs to the metric system, used in most of the world. The inch belongs to the imperial and US customary systems, used daily in the United States and often in the…