Centimeter to Millimeter Converter
One Centimeter equals 10 Millimeter (1 cm = 10 mm). Multiply a Centimeter value by 10 to get the equivalent in Millimeter. Use the calculator above for instant results, or follow the formula, worked examples, and reference table below.
Formula
mm = cm × 10
Multiply the Centimeter value by 10 to get the equivalent value in Millimeter.
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 Centimeter × 10 = 100 Millimeter.
- 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 Millimeter (1 cm = 10 mm). Centimeter to Millimeter conversion comes up most often in body height and clothing measurements and in furniture and interior dimensions, typically when figures need restating for 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
15 Centimeter equals 150 Millimeter.
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 Millimeter.
What is the formula for Centimeter to Millimeter?
The formula is mm = cm × 10.
How many Millimeter are in 1 Centimeter?
1 Centimeter equals 10 Millimeter.
Can I convert Millimeter back to Centimeter?
Yes. 1 Millimeter equals 0.1 Centimeter, 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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