How to convert centimeters to millimeters
mm = cm × 10Multiply the value in centimeters by 10. To go the other way, multiply by 0.1 (or divide by 10).
A centimeter is larger than a millimeter: one centimeter contains 10 millimeters.
Worked examples
- 1 centimeter1 cm × 10 = 10 mm
- 5 centimeters5 cm × 10 = 50 mm
- 10 centimeters10 cm × 10 = 100 mm
- 20 centimeters20 cm × 10 = 200 mm
- 100 centimeters100 cm × 10 = 1,000 mm
Centimeters to millimeters conversion table
Values are calculated by the conversion engine and rounded to 8 significant figures.
| Centimeters (cm) | Millimeters (mm) |
|---|---|
| 0.1 cm | 1 mm |
| 0.25 cm | 2.5 mm |
| 0.5 cm | 5 mm |
| 1 cm | 10 mm |
| 2 cm | 20 mm |
| 3 cm | 30 mm |
| 4 cm | 40 mm |
| 5 cm | 50 mm |
| 6 cm | 60 mm |
| 7 cm | 70 mm |
| 8 cm | 80 mm |
| 9 cm | 90 mm |
| 10 cm | 100 mm |
| Centimeters (cm) | Millimeters (mm) |
|---|---|
| 12 cm | 120 mm |
| 15 cm | 150 mm |
| 20 cm | 200 mm |
| 25 cm | 250 mm |
| 30 cm | 300 mm |
| 40 cm | 400 mm |
| 50 cm | 500 mm |
| 75 cm | 750 mm |
| 100 cm | 1,000 mm |
| 250 cm | 2,500 mm |
| 500 cm | 5,000 mm |
| 1,000 cm | 10,000 mm |
About the units
Centimeter (cm)
One hundredth of a metre. Centimetres are the everyday metric unit for body height, clothing sizes and small objects; a standard paper clip is about 3 cm long. One centimeter equals 0.01 meters (m).
Millimeter (mm)
One thousandth of a metre. Millimetres are the standard unit on engineering drawings, rulers and rainfall gauges; a credit card is about 0.76 mm thick. One millimeter equals 0.001 meters (m).
Frequently asked questions
How many millimeters are in one centimeter?
There are 10 millimeters in one centimeter, and this value is exact by definition.
How do I convert centimeters to millimeters?
Multiply the number of centimeters by 10. For example, 10 cm × 10 = 100 mm.
How many centimeters are in one millimeter?
One millimeter equals 0.1 centimeters. That is the reverse factor, 1 ÷ 10.
What is 10 centimeters in millimeters?
10 cm = 100 mm.
Is this cm to mm converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.