How to use CM to MM
- Type a value in centimeters.
- The result in millimeters appears instantly.
- Type in the second box to convert the other way.
How to convert centimeters to millimeters
Multiply the value in centimeters by 10. Formula: mm = cm × 10. Example: 10 cm × 10 = 100 mm.
Common centimeters to millimeters conversions
5 cm = 50 mm. 25 cm = 250 mm. 50 cm = 500 mm. 100 cm = 1,000 mm.
Where is cm to mm conversion used?
Length conversions come up constantly when metric and imperial systems meet: checking your height for a visa or medical form, comparing screen and TV sizes, buying furniture or clothes from another country, reading product dimensions on international shopping sites, and following DIY or engineering drawings.
What are centimeters?
A centimeter is one hundredth of a meter. It is the everyday metric unit for height, clothing sizes and object dimensions in most countries.
What are millimeters?
A millimeter is one thousandth of a meter. It is used for small, precise measurements like screw sizes, rainfall and phone thickness.
Centimeters to millimeters conversion table
| Centimeters (cm) | Millimeters (mm) |
|---|---|
| 1 | 10 |
| 2 | 20 |
| 3 | 30 |
| 4 | 40 |
| 5 | 50 |
| 6 | 60 |
| 7 | 70 |
| 8 | 80 |
| 9 | 90 |
| 10 | 100 |
| 12 | 120 |
| 15 | 150 |
| 20 | 200 |
| 25 | 250 |
| 30 | 300 |
| 50 | 500 |
| 75 | 750 |
| 100 | 1,000 |
Frequently asked questions
How many millimeters are in 1 centimeter?
1 centimeter = 10 millimeters (1 cm = 10 mm).
How many centimeters are in 1 millimeter?
1 millimeter = 0.1 centimeters (1 mm = 0.1 cm).
What is 10 cm in millimeters?
10 cm = 100 mm.
What is 100 cm in millimeters?
100 cm = 1,000 mm.
Is the cm to mm conversion exact?
Yes. Since 1959 the inch has been defined as exactly 2.54 cm, so every imperial–metric length factor (inch, foot, yard, mile) is exact. Results here are rounded only for display.
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