Centimetres to millimetres converter
Millimetres (mm)
1 centimetre = 10 millimetres
How to convert centimetres to millimetres
mm = cm × 10
Multiply the number of centimetres by 10 to get millimetres. Going the other way, divide by 10 (or multiply by 0.1).
One centimetre is exactly defined as 10 millimetres (to 12 significant figures), and one millimetre is 0.1 centimetres.
Worked examples
- Convert 5 centimetres: 5 × 10 = 50 50 millimetres.
- Convert 12.5 centimetres: 12.5 × 10 = 125 125 millimetres.
- Convert 250 centimetres: 250 × 10 = 2,500 2,500 millimetres.
Quick-reference table
| cm | mm |
|---|---|
| 1 | 10 |
| 2 | 20 |
| 3 | 30 |
| 5 | 50 |
| 10 | 100 |
| 15 | 150 |
| 20 | 200 |
| 25 | 250 |
| 50 | 500 |
| 75 | 750 |
| 100 | 1,000 |
| 1,000 | 10,000 |
| mm | cm |
|---|---|
| 1 | 0.1 |
| 2 | 0.2 |
| 3 | 0.3 |
| 5 | 0.5 |
| 10 | 1 |
| 15 | 1.5 |
| 20 | 2 |
| 25 | 2.5 |
| 50 | 5 |
| 75 | 7.5 |
| 100 | 10 |
| 1,000 | 100 |
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Frequently asked questions
How many millimetres are in 1 centimetre?
1 centimetre equals 10 millimetres.
What is the formula to convert centimetres to millimetres?
Use mm = cm × 10. Multiply the number of centimetres by 10 to get millimetres. Going the other way, divide by 10 (or multiply by 0.1).
What is 100 centimetres in millimetres?
100 centimetres is 1,000 millimetres.