Q:

# How do you convert cm to mm?

A:

Centimeters and millimeters are both fractional amounts of a metric meter. One centimeter is 1/100 of a meter and 1 millimeter is 1/1,000 of a meter. Therefore, each centimeter is equal to 10 millimeters.

## Keep Learning

1. ### Calculate length in centimeters

Measure the length of the object in centimeters using a standard ruler or measuring tape. Record the answer.

2. ### Multiply the number of centimeters by 10

Multiply the number of centimeters by 10. For example, if a board measures 42 centimeters, take 42 and multiply it by 10. The board measures 420 millimeters.

3. ### Record the answer in millimeters

Record the converted amount, such as 420 millimeters.

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