What is 4.5 millimeters to inches? The answer is that 4.5 mm equals 0.1771 inches.
How to convert 4.5 mm to inches? We know that one inch is equal to 25.4 millimeters, so to convert 4.5 millimeters to inches, we must divide the amount of centimeters by 25.4, which means that 4.5 millimeters is equal to 4.5 mm ÷ 25.4 = 0.1771 inches.
See also: How to convert 4.5 inches to mm.