40 millimeters (mm) to centimeters (cm)

40 millimeters = 4 centimeters

To convert 40 millimeters to centimeters, divide 40 millimeters by the conversion factor 10 (since 1 millimeter equals 1/10 centimeters).

The conversion formula is :
centimeters = millimeters ÷ 10

Here's the calculation to convert 40 mm to cm :
40 millimeters ÷ 10 = 4 centimeters

Therefore, 40 millimeters is equal to 4 centimeters

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. 40 mm).

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. 4 cm).