What is 42 millimeters to inches? The answer is that 42 mm equals 1.6535 inches.
How to convert 42 mm to inches? We know that one inch is equal to 25.4 millimeters, so to convert 42 millimeters to inches, we must divide the amount of centimeters by 25.4, which means that 42 millimeters is equal to 42 mm ÷ 25.4 = 1.6535 inches.
See also: How to convert 42 inches to mm.