Converting centimeters (cm) to millimeters (mm) is common on metric rulers, sewing patterns, and engineering tolerances. One centimeter equals ten millimeters, so mm = cm × 10.
mm = cm × 10
Multiply centimeters by 10 to get millimeters. This is an exact decimal shift in the SI metric system.
| centimeter | millimeter |
|---|---|
| 1 | 10 |
| 2 | 20 |
| 5 | 50 |
| 10 | 100 |
| 25 | 250 |
| 50 | 500 |
| 100 | 1,000 |
A pattern lists 12.5 cm width. How many millimeters?
12.5 cm equals 125 mm.
One Centimeter (cm) equals 10 Millimeters (mm)
Units of length are standardized measurements used to define physical dimensions, tolerances, and distances in engineering drawings, construction plans, and product specifications across metric and imperial systems.
One Millimeter (mm) equals 0.1 Centimeter (cm)
Units of length are standardized measurements used to define physical dimensions, tolerances, and distances in engineering drawings, construction plans, and product specifications across metric and imperial systems.
How many mm in a cm?
10 mm—multiply cm by 10.
How do I convert 3 cm to mm?
3 × 10 = 30 mm.
How do I convert mm back to cm?
Divide mm by 10.
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