Millimeters to Centimeters Converter
Convert millimeters (mm) to centimeters (cm) instantly. Type a value above and the result updates while you type. 1 millimeter equals 0.1 centimeters.
Result updates as you type. Values are calculated locally in your browser — nothing is sent to a server.
The formula
1 millimeter = 0.1 centimeters
Multiply the millimeters value by 0.1 to get centimeters. Or divide by 10 to go the other way.
Millimeters to centimeters conversion table
| mm | cm |
|---|---|
| 1 | 0.1 |
| 2 | 0.2 |
| 3 | 0.3 |
| 4 | 0.4 |
| 5 | 0.5 |
| 6 | 0.6 |
| 7 | 0.7 |
| 8 | 0.8 |
| 9 | 0.9 |
| 10 | 1 |
| 15 | 1.5 |
| 20 | 2 |
| 25 | 2.5 |
| 50 | 5 |
| 75 | 7.5 |
| 100 | 10 |
Worked examples
- 5 mm × 0.1 = 0.5 cm
- 30 mm × 0.1 = 3 cm
- 165 mm × 0.1 = 16.5 cm
Conversion factors follow the exact international definitions (SI/BIPM; imperial units per the 1959 International Yard and Pound Agreement, maintained by NIST). NIST unit conversion reference
Factors last verified August 2026 · Built by Jeffrey Tepper.
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Frequently asked questions
How many centimeters are in 1 millimeter?
1 millimeter equals 0.1 centimeters (mm → cm).
How do you convert millimeters to centimeters?
Multiply the number of millimeters by 0.1. For example: 10 mm × 0.1 = 1 cm.
What is 50 mm in cm?
50 mm equals 5 cm.
Which is bigger: 1 millimeter or 1 centimeter?
1 centimeter is bigger: 1 millimeter is only 0.1 centimeters.