What is 13 millimeters to inches? The answer is that 13 mm equals 0.5118 inches.
How to convert 13 mm to inches? We know that one inch is equal to 25.4 millimeters, so to convert 13 millimeters to inches, we must divide the amount of centimeters by 25.4, which means that 13 millimeters is equal to 13 mm ÷ 25.4 = 0.5118 inches.
See also: How to convert 13 inches to mm.