cm to mm

This converter makes instant conversions from centimeters (cm) to millimeters (mm). It also provides the conversion steps. To use the converter, please provide a value in the input field. The converter will begin making conversions as the values are being typed in.

How many millimeters in a centimeter?

Both millimeter and centimeter are units of length in the International System of Units (SI). In SI, units of measurement are comprised of a base unit and a prefix that describes the magnitude of the unit. Both the base units of the millimeters and centimeters are the meter. The prefix "milli-" indicates the magnitude 10^-3 and the prefix "centi-" indicates the magnitude 10^-2. In other words, a millimeter is = 0.001 meters and a centimeter is = 0.01 meters. Based on these definitions, there are 10 millimeters in a centimeter.

How to convert centimeters to millimeters

Based on the definition of 10 mm in 1 cm, the cm to mm conversion formula is:

mm = 10 × cm

Thus, to convert from centimeters to millimeters, multiply a value in centimeters by 10. For example, convert 2.56 centimeters to millimeters:

2.56 cm = 2.56 × 10 mm = 25.6 mm