What is 16 inches to millimeters? The answer is that 16 inches equals 406.4 millimeters.
How to convert 16 inches to mm? We know that one inch is equal to 25.4 millimeters, so to convert 16 inches to millimeters, we must multiply the amount of centimeters by 25.4, which means that 16 inches is equal to 16 inches × 25.4 = 406.4 mm.
See also: How to convert 16 mm to inches.