Convert Centimeters to Millimeters
One centimeter equals 10 millimeters. Type any value to convert centimeters to millimeters instantly — with a full reference table below.
Convert Centimeters to Millimeters
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How to convert Centimeters to Millimeters
To convert centimeters to millimeters, multiply by 10. One centimeter equals 10 mm, and one millimeter equals 0.1 cm.
- Take the value in centimeters — for example 7.5 cm.
- Multiply by 10 (the number of millimeters in one centimeter).
- 7.5 × 10 = 75 mm.
Shortcut: the factor is a power of ten, so just move the decimal point 1 place to the right.
Centimeters to Millimeters conversion table
| Centimeters | Millimeters |
|---|---|
| 1 cm | 10 mm |
| 2 cm | 20 mm |
| 3 cm | 30 mm |
| 4 cm | 40 mm |
| 5 cm | 50 mm |
| 6 cm | 60 mm |
| 7 cm | 70 mm |
| 8 cm | 80 mm |
| 9 cm | 90 mm |
| 10 cm | 100 mm |
| 12 cm | 120 mm |
| 15 cm | 150 mm |
| 20 cm | 200 mm |
| 25 cm | 250 mm |
| 50 cm | 500 mm |
| 100 cm | 1,000 mm |
| Millimeters | Centimeters |
|---|---|
| 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 |
| 12 mm | 1.2 cm |
| 15 mm | 1.5 cm |
| 20 mm | 2 cm |
| 25 mm | 2.5 cm |
| 50 mm | 5 cm |
| 100 mm | 10 cm |
About converting Centimeters to Millimeters
Centimeters (cm) and Millimeters (mm) are both units of length. The exact factor is 1 cm = 10 mm, so multiply by 10 to go from centimeters to millimeters (or divide to go back).
The conversion runs entirely in your browser. Need the reverse? Use the Millimeters to Centimeters converter, or the full unit converter for every unit at once.
Real-world length in centimeters and millimeters
| Example | Centimeters | Millimeters |
|---|---|---|
| A credit card's width (ISO/IEC 7810) | 8.56 cm | 85.6 mm |
| The long side of A4 paper (ISO 216) | 29.7 cm | 297 mm |
| A US standard door (80 in tall) | 203.2 cm | 2,032 mm |
| A football pitch (FIFA recommended length) | 10,500 cm | 105,000 mm |
“≈” marks typical values; the rest are defined or measured figures.
The units
One hundredth of a metre.
Used for: Body height in most countries, clothing and everyday measuring.
One thousandth of a metre.
Used for: Engineering drawings, rainfall, screen and jewellery sizes.
Every length factor here is exact: the inch has been defined as exactly 25.4 mm since the 1959 International Yard and Pound Agreement.