EngiRef / Length conversion
Convert Centimeters to Millimeters (cm to mm)
1 cm = 10 mm. Convert centimeters to millimeters with the exact factor, a common-values table and a free converter.
Conversion factor
mm = cm × 10
1 cm = 10 mm
Multiply by 10 mm to go from centimeters to millimeters, or divide by it to come back. The factor and every value below are computed by the same converter that runs at /convert, so this page and the tool cannot disagree.
cm to mm table
| Centimeters (cm) | Millimeters (mm) |
|---|---|
| 1 cm | 10 mm |
| 2 cm | 20 mm |
| 5 cm | 50 mm |
| 10 cm | 100 mm |
| 20 cm | 200 mm |
| 50 cm | 500 mm |
| 100 cm | 1000 mm |
Every figure is computed at build time by the site’s own converter from the length unit registry. For a value that is not listed, put it into the interactive converter.
Frequently asked questions
How many millimeters are in one centimeter?
One centimeter is 10 mm, so 100 cm is 1000 mm.
What is the formula to convert centimeters to millimeters?
mm = cm × 10. Multiply the value in centimeters by 10 to get millimeters.
How do I convert millimeters back to centimeters?
cm = mm × 0.1, so 1 mm is 0.1 cm. The mm to cm page carries the same table in that direction.