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Centimeter to Millimeter
Convert centimeter (cm) to millimeter (mm) — with the exact factor, a quick-reference table and a free converter that works offline.
1 cm = 10 mm
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Conversion table
| Centimeter (cm) | Millimeter (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 | 1,000 mm |
| 500 cm | 5,000 mm |
How the conversion works
Both units measure length. One centimeter equals exactly 10 mm, so multiply by that factor to convert.
FAQ
How many millimeters in a centimeter?
1 cm = 10 mm.
How do I convert centimeter to millimeter?
Multiply the centimeter value by 10. For example, 10 cm × 10 = 100 mm.
Where does the factor come from?
The conversion factor is defined in BIPM SI Brochure; both units are length units converted through meter.
Related conversions
Conversion factors: BIPM SI Brochure. Computed by the same engine that powers the app.
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