What is 25.4 millimeters to inches? The answer is that 25.4 mm equals 1 inches.
How to convert 25.4 mm to inches? We know that one inch is equal to 25.4 millimeters, so to convert 25.4 millimeters to inches, we must divide the amount of centimeters by 25.4, which means that 25.4 millimeters is equal to 25.4 mm ÷ 25.4 = 1 inches.
See also: How to convert 25.4 inches to mm.