Centimeters to Millimeters Converter
One Centimeter equals 10 Millimeters (1 cm = 10 mm). Multiply a Centimeter value by 10 to get the equivalent in Millimeters. Enter your value in the calculator above. The formula and examples below show how to calculate it by hand.
Formula
mm = cm × 10
Multiply the Centimeter value by 10 to get the equivalent value in Millimeters.
Example Conversions
1 Centimeter (cm)
10 Millimeter (mm)
5 Centimeter (cm)
50 Millimeter (mm)
10 Centimeter (cm)
100 Millimeter (mm)
25 Centimeter (cm)
250 Millimeter (mm)
100 Centimeter (cm)
1000 Millimeter (mm)
Conversion Table
| Centimeter (cm) | Millimeter (mm) |
|---|---|
| 0.1 | 1 |
| 0.5 | 5 |
| 1 | 10 |
| 2 | 20 |
| 5 | 50 |
| 10 | 100 |
| 25 | 250 |
| 50 | 500 |
| 100 | 1000 |
| 250 | 2500 |
| 500 | 5000 |
| 1000 | 10000 |
How to Convert Manually
Use these steps to convert Centimeter values to Millimeter without the calculator.
- Write down the value in Centimeter (cm) that you want to convert.
- Multiply that value by 10.
- For example, 10 Centimeters × 10 = 100 Millimeters.
- Label the result as Millimeter (mm).
Relative Size Comparison
This chart shows the visual difference in size between exactly one Centimeter and one Millimeter.
About Centimeter and Millimeter
The centimeter is one hundredth of a meter (10 millimeters). It is the everyday small-length unit in metric countries, used where inches would be used in the US. The millimeter is one thousandth of a meter. Engineering and manufacturing drawings in metric countries are dimensioned almost exclusively in millimeters to avoid decimal points. One Centimeter equals 10 Millimeters (1 cm = 10 mm). Centimeter is used in body height and clothing measurements and in furniture and interior dimensions. Millimeter is used in engineering and CAD drawings.
Precision and Rounding:Length factors between metric and imperial units are exact by definition (1 ft = 0.3048 m since 1959), so any rounding error comes from display precision, not the factor. Two or three decimal places suit carpentry and DIY work; machining and surveying often require four or more.
Conversion factors per NIST Special Publication 811 and the BIPM SI Brochure (9th edition) (reference).
Worked Example
15Centimeters equals150Millimeters.
15 cm × 10 = 150 mm
FAQ
How do I convert Centimeter to Millimeter?
Multiply the Centimeter value by 10 to get the equivalent value in Millimeters.
What is the formula for Centimeter to Millimeter?
The formula is mm = cm × 10.
How many Millimeters are in 1 Centimeter?
1 Centimeter equals 10 Millimeters.
Can I convert Millimeter back to Centimeter?
Yes. 1 Millimeter equals 0.1 Centimeters, and the related converter can reverse the calculation.
What are common names for Centimeter and Millimeter?
Centimeter is shown as cm and may also be searched as centimetre, centimeters, centimetres. Millimeter is shown as mm and may also be searched as millimetre, millimeters, millimetres.
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