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Centimeters to Millimeters

Type a value in either box. 1 cm = 10 mm.

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How to convert centimeters to millimeters

1 cm = 10 mm, and 1 mm = 0.1 cm. To convert centimeters to millimeters, use:

mm = cm × 10

Example: convert 30 cm to millimeters: 30 × 10 = 300, so 30 cm = 300 mm.

Good to know

Multiply by 10. Engineering drawings and screw sizes use millimeters, so 2.5 cm is written as 25 mm.

Centimeters to Millimeters chart

Centimeters (cm)Millimeters (mm)
1 cm10 mm
2 cm20 mm
3 cm30 mm
4 cm40 mm
5 cm50 mm
6 cm60 mm
7 cm70 mm
8 cm80 mm
9 cm90 mm
10 cm100 mm
12 cm120 mm
15 cm150 mm
20 cm200 mm
25 cm250 mm
30 cm300 mm
40 cm400 mm
50 cm500 mm
60 cm600 mm
70 cm700 mm
80 cm800 mm
90 cm900 mm
100 cm1,000 mm
150 cm1,500 mm
160 cm1,600 mm
165 cm1,650 mm
170 cm1,700 mm
175 cm1,750 mm
180 cm1,800 mm
185 cm1,850 mm
190 cm1,900 mm
200 cm2,000 mm

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