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20 centimeters to millimeters

20 centimeters = 200 millimeters

Rounded to a practical precision: 200 mm.

How the calculation works

One centimeter is 10 millimeters, so:

20 cm × 10 = 200 mm

Reversing it, 200 millimeters ÷ 10 returns 20 centimeters.

Nearby values

CentimetersMillimeters
16 cm160 mm
17 cm170 mm
18 cm180 mm
19 cm190 mm
20 cm200 mm
21 cm210 mm
22 cm220 mm
23 cm230 mm
24 cm240 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 20 centimeters?

20 centimeters is 200 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