The equivalent of 42 centimeters is 16.53 inches. That number is determined by using the formula in which 42 is multiplied by 0.39. There are 0.39 inches in a centimeter.
The centimeter is a unit of length in the metric system of measurement; it is used throughout most of the world and is the standard unit for scientific research. The inch is a unit of measurement in the imperial system of measurement, which is primarily used in the United States and Canada. Many people in the United Kingdom and parts of the Commonwealth use the imperial system for unofficial purposes.