Instantly convert centimeters (cm) to millimeters (mm). Bidirectional, accurate, and free.
To convert centimeters to millimeters, use the formula millimeters = centimeters × 10. For example, 2 centimeters equals 20 millimeters. Type any number into the calculator above and the result appears instantly — you can also type into the millimeters box to convert the other way.
| Centimeters | Millimeters |
|---|---|
| 1 cm | 10 mm |
| 2 cm | 20 mm |
| 3 cm | 30 mm |
| 5 cm | 50 mm |
| 10 cm | 100 mm |
| 20 cm | 200 mm |
| 50 cm | 500 mm |
| 100 cm | 1,000 mm |
There are 10 millimeters in one centimeter. To convert any value, apply the formula millimeters = centimeters × 10.
The formula is millimeters = centimeters × 10. Enter a value above and the result updates instantly in both directions.
Yes. It uses the exact internationally-defined conversion factor, so results match official standards to several decimal places.
Yes — the converter is bidirectional. Type in either box and the other updates automatically using the inverse formula.