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18 centimeters to millimeters

18 centimeters = 180 millimeters

Rounded to a practical precision: 180 mm.

How the calculation works

One centimeter is 10 millimeters, so:

18 cm × 10 = 180 mm

Reversing it, 180 millimeters ÷ 10 returns 18 centimeters.

Nearby values

CentimetersMillimeters
14 cm140 mm
15 cm150 mm
16 cm160 mm
17 cm170 mm
18 cm180 mm
19 cm190 mm
20 cm200 mm
21 cm210 mm
22 cm220 mm

About these units

Centimeter (cm) — A centimetre is one hundredth of a metre, the everyday metric unit for body measurements and small objects.

Millimeter (mm) — A millimetre is one thousandth of a metre and is the default unit on engineering drawings and rulers.

Frequently asked questions

How many millimeters is 18 centimeters?

18 centimeters is 180 millimeters.

How do I convert centimeters to millimeters myself?

Multiply by 10. To go back, divide by 10 — or multiply by 0.1.

Is this figure exact?

The conversion factor between the centimeter and the millimeter is fixed by definition. The figure above is rounded for readability; the converter carries full precision.

Convert other values

Full centimeters to millimeters converter · All length converters