Millimeters to centimeters (mm to cm) conversion calculator and how to convert.
Metric Length Converter
Easily convert between millimeters, centimeters, and other metric units
Millimeters to Centimeters
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Centimeters to Millimeters
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Multi-Unit Metric Converter
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Metric Length Reference
Common Conversions:
- 1 cm = 10 mm
- 1 m = 100 cm
- 1 m = 1000 mm
- 1 km = 1000 m
Practical Examples:
- Credit card thickness: ~0.76 mm
- Pencil diameter: ~7 mm
- Standard paper (A4): 210 × 297 mm
- Average adult height: ~170 cm
The metric system is based on powers of 10, making it easy to convert between units:
- kilo- (k) = ×1,000
- hecto- (h) = ×100
- deca- (da) = ×10
- deci- (d) = ×0.1
- centi- (c) = ×0.01
- milli- (m) = ×0.001
Metric converter tool • Last updated May 2025
How to convert millimeters to centimeters
1 mm is equal to 0.1 centimeters:
1 mm = 0.1 cm
The distance d in centimeters (cm) is equal to the distance d in millimeters (mm) divided by 10:
d(cm) = d(mm) / 10
Example
Convert 20 millimeters to centimeters:
d(cm) = 20mm / 10 = 2cm
Millimeters to centimeters conversion table
| Millimeters (mm) | Centimeters (cm) |
|---|---|
| 0.01 mm | 0.001 cm |
| 0.1 mm | 0.01 cm |
| 1 mm | 0.1 cm |
| 2 mm | 0.2 cm |
| 3 mm | 0.3 cm |
| 4 mm | 0.4 cm |
| 5 mm | 0.5 cm |
| 6 mm | 0.6 cm |
| 7 mm | 0.7 cm |
| 8 mm | 0.8 cm |
| 9 mm | 0.9 cm |
| 10 mm | 1 cm |
| 20 mm | 2 cm |
| 30 mm | 3 cm |
| 40 mm | 4 cm |
| 50 mm | 5 cm |
| 60 mm | 6 cm |
| 70 mm | 7 cm |
| 80 mm | 8 cm |
| 90 mm | 9 cm |
| 100 mm | 10 cm |
