Length conversion
Centimetre to Millimetre
One centimetre is 10 millimetres. Enter any value below to convert it instantly, or use the reference table further down for the numbers you need most often.
Conversion rate
1 cm = 10 mm
mm = cm × 10
1 cm = 10 mm
Reference
Centimetre to Millimetre table
The values people look up most often, rounded for practical use.
| Centimetre (cm) | Millimetre (mm) | Written out |
|---|---|---|
| 1 cm | 10 mm | 1 centimetres = 10 millimetres |
| 2 cm | 20 mm | 2 centimetres = 20 millimetres |
| 3 cm | 30 mm | 3 centimetres = 30 millimetres |
| 5 cm | 50 mm | 5 centimetres = 50 millimetres |
| 10 cm | 100 mm | 10 centimetres = 100 millimetres |
| 15 cm | 150 mm | 15 centimetres = 150 millimetres |
| 20 cm | 200 mm | 20 centimetres = 200 millimetres |
| 25 cm | 250 mm | 25 centimetres = 250 millimetres |
| 50 cm | 500 mm | 50 centimetres = 500 millimetres |
| 100 cm | 1,000 mm | 100 centimetres = 1,000 millimetres |
| 250 cm | 2,500 mm | 250 centimetres = 2,500 millimetres |
| 500 cm | 5,000 mm | 500 centimetres = 5,000 millimetres |
| 1,000 cm | 10,000 mm | 1,000 centimetres = 10,000 millimetres |
How to convert centimetres to millimetres
Multiply the number of centimetres by 10. That is the whole calculation: mm = cm × 10. To go back the other way, divide instead, or multiply by 0.1.
Worked example: 12 centimetres × 10 = 120 millimetres.
Where this conversion comes up
Length conversions show up constantly in printing, DIY, engineering drawings and anything bought from a country using the other measurement system. If you are converting in order to set a page or grid size, the graph paper generator accepts spacing in millimetres directly, and the on-screen ruler lets you check a printed result against both scales.
Quick answers
- 1 centimetre = 10 millimetres
- 2 centimetres = 20 millimetres
- 5 centimetres = 50 millimetres
- 10 centimetres = 100 millimetres
- 100 centimetres = 1,000 millimetres
More conversions
Other length conversions
Answers
Frequently asked questions
mm = cm × 10. The converter above applies it for you, but the formula is useful in a spreadsheet, put your value in column A and the formula in column B.Related tools
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