42 centimeters (cm) to millimeters (mm)

42 centimeters = 420 millimeters

To convert 42 centimeters to millimeters, multiply 42 centimeters by the conversion factor 10 (since 1 centimeter equals 10 millimeters).

The conversion formula is :
millimeters = centimeters × 10

Here's the calculation to convert 42 cm to mm :
42 centimeters × 10 = 420 millimeters

Therefore, 42 centimeters is equal to 420 millimeters

A centimeter is a unit of length in the International System of Units (SI), equal to one hundredth of a meter. It is abbreviated using the symbol cm (e.g. 42 cm).

A millimeter is a unit of length in the International System of Units (SI), equal to one thousandth of a meter. It is abbreviated using the symbol mm (e.g. 420 mm).