How to convert centimetres to millimetres
mm = cm × 10
Example: 5 cm × 10 = 50 mm
Centimeters to Millimeters table
| Centimeters (cm) | Millimeters (mm) |
|---|---|
| 0.5 cm | 5 mm |
| 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 |
| 15 cm | 150 mm |
| 20 cm | 200 mm |
| 25 cm | 250 mm |
| 30 cm | 300 mm |
| 40 cm | 400 mm |
| 50 cm | 500 mm |
| 75 cm | 750 mm |
| 100 cm | 1,000 mm |
| 250 cm | 2,500 mm |
| 500 cm | 5,000 mm |
| 1,000 cm | 10,000 mm |
About these units
Centimeters (cm): A centimetre is one hundredth of a metre (0.01 m). It is the everyday metric unit for body height, clothing and small objects.
Millimeters (mm): A millimetre is one thousandth of a metre (0.001 m), used for precise measurements in engineering, rainfall and screen sizes.
Frequently asked questions
How many millimetres are in 1 centimetre?
1 centimetre (cm) equals 10 millimetres (mm).
How do I convert cm to mm?
Multiply the value in centimetres by 10. For example, 5 cm × 10 = 50 mm.
How do I convert millimetres back to centimetres?
Multiply by 0.1 (or divide by 10). 1 mm = 0.1 cm.
What is a centimetre?
A centimetre is one hundredth of a metre (0.01 m). It is the everyday metric unit for body height, clothing and small objects.
Conversion factors come from exact international definitions (NIST SP 811, BIPM) where they exist. Results show up to 10 significant digits. Need every length unit at once? Use the Length Converter.