Centimetres to Millimetres
Convert centimetres (cm) to millimetres (mm) instantly — with formula and reference table.
cm
mm
Quick answer: 1 cm = 10 mm. To convert centimetres to millimetres, multiply by cm × 10.
Converting centimetres to millimetres
This converter changes a value in centimetres (cm) into millimetres (mm). One centimetre equals 10 mm. One centimetre equals exactly 10 millimetres. The conversion runs entirely in your browser — enter a value and the result updates instantly, in either direction.
Formula
mm = cm × 10
Example
Convert 10 cm to mm: 10 × 10 = 100 mm.
Centimetres to Millimetres conversion table
| Centimetres (cm) | Millimetres (mm) |
|---|---|
| 1 cm | 10 mm |
| 2 cm | 20 mm |
| 3 cm | 30 mm |
| 5 cm | 50 mm |
| 10 cm | 100 mm |
| 20 cm | 200 mm |
| 25 cm | 250 mm |
| 50 cm | 500 mm |
| 100 cm | 1000 mm |
Popular centimetres to millimetres conversions
Quick answers for the cm values people look up most often:
- 4 cm = 40 mm
- 6 cm = 60 mm
- 7 cm = 70 mm
- 8 cm = 80 mm
- 9 cm = 90 mm
- 12 cm = 120 mm
- 15 cm = 150 mm
- 30 cm = 300 mm
- 40 cm = 400 mm
- 60 cm = 600 mm
- 75 cm = 750 mm
- 80 cm = 800 mm
- 90 cm = 900 mm
- 150 cm = 1500 mm
- 200 cm = 2000 mm
- 250 cm = 2500 mm
- 500 cm = 5000 mm
- 1000 cm = 10000 mm
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How to use this converter
- Enter a value in the centimetres (cm) field.
- Read the converted value in millimetres (mm) below.
- Type into the mm field instead to convert in reverse, or use the swap button.
Frequently asked questions
How many millimetres are in a centimetre?
1 centimetre equals 10 millimetres.
How do I convert 3.5 cm to mm?
3.5 times 10 = 35 mm.
How many mm is 30 cm?
30 cm equals 300 mm.
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