Convert 2 cm to mm

How to convert centimeters to millimeters

1. Formula: millimeters = centimeters × 10
2. Put in the value: 2 centimeters.
3. Result: 20 millimeters.

Centimeters to millimeters table

Converting the other way: millimeters to centimeters

centimeters = millimeters × 0.1. So 20 millimeters is back to 2 centimeters; one millimeter is 0.1 centimeters. See the millimeters to centimeters table.

Quick estimate in your head

For a rough answer, multiply by about 10: 2 × 10 ≈ 20 mm, against the exact 20 mm (0.0% out). Good enough to check that a calculated result is sensible.

Common mistakes

The usual slip is using the factor the wrong way round. A centimeter is bigger than a millimeter, so the number of millimeters must come out larger than the number of centimeters. If your answer goes the other way, divide instead of multiplying.

About the units

Centimeter (cm) and millimeter (mm) are both units of length. One centimeter equals 10 millimeters, and one millimeter equals 0.1 centimeters. Results on this page are rounded for display; the conversion itself uses the exact definitions.

Length conversions come up in DIY and building plans, running and cycling distances, maps, clothing sizes and travel between countries that use metric and imperial units.

2 centimeters in other units

The most readable unit for this amount is centimeters (2).

• 20 mm
• 0.02 m
• 0.00002 km
• 0.78740157 in
• 0.0656168 ft
• 0.02187227 yd
• 0.00001243 mi
• 0.0000108 nmi
• 0.01093613 fm
• 20,000 um

How this answer was calculated

The result is worked out from the numbers in this page's address when the page is opened, using exact arithmetic wherever possible and rounding only for display. Nothing is copied from a printed table. If you think an answer is wrong, please tell us through the contact page and we will check it.

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