Centimeters to Millimeters Converter
Formula
mm = cm × 10
One centimeter equals exactly 10 millimeters.
How to use
- Enter the length in the Centimeters field.
- The millimeters value updates automatically.
- Read the converted length in millimeters.
Example
10 cm converts to 100 mm (10 × 10), since one centimeter equals exactly 10 millimeters.
Frequently Asked Questions
How many mm in 1 cm?
1 cm = 10 mm exactly.
How many millimeters are in a meter?
There are 1,000 millimeters in one meter, since a millimeter is one-thousandth of a meter. Because a centimeter is one-hundredth of a meter, this also confirms there are 10 millimeters in every centimeter. So a 2-meter length equals 200 cm or 2,000 mm.
How do I convert millimeters back to centimeters?
To convert millimeters to centimeters, divide by 10, since 10 mm make up one centimeter. For example, 85 mm ÷ 10 = 8.5 cm. This is handy when a ruler or spec sheet lists a measurement in millimeters but you want the more familiar centimeter figure.