What is 0.125 inches to millimeters? The answer is that 0.125 inches equals 3.175 millimeters.
How to convert 0.125 inches to mm? We know that one inch is equal to 25.4 millimeters, so to convert 0.125 inches to millimeters, we must multiply the amount of centimeters by 25.4, which means that 0.125 inches is equal to 0.125 inches × 25.4 = 3.175 mm.
See also: How to convert 0.125 mm to inches.