This page allows you to convert length values **expressed in millimeters** to **their equivalent in centimeters**.

Enter the value in millimeters in the top field (the one marked "mm"), then press the "Convert" button or the "Enter" key. The converter also works the other way round: if you enter the value in centimeters in the "cm" field, the equivalent value in millimeters is calculated and displayed in the top field.

One millimeter, in the metric system, is equivalent to 1/1000 (one thousandth) of a meter. **1 mm = 10 ^{-3} m**.

It is used to describe lengths that are relatively small, like the widths of pipes, cables or connectors. The well known terms 8mm, 16mm and 32mm describe common widths of motion picture films.

To understand the approximate size of one millimeter, see this tiny red line: . And this line should be approximately five millimeters long:

Centimeter is a unit of length used by the metric system. One centimeter is 1/100 of a meter. That means there are 100 centimeters in 1 meter. One inch is equal to 2.54 cm. The following line should be approximately 1 centimeter long: