Convert 21 Centimeters to Millimeters
How long is 21 centimeters? How far is 21 centimeters in millimeters? 21 cm to mm conversion.
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21 Centimeters =
210 Millimeters
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Result in Plain English
21 centimeters is equal to exactly 210 millimeters.
In Scientific Notation
21 centimeters
= 2.1 x 101 centimeters
= 2.1 x 102 millimeters
Centimeters
A centimeter, or centimetre, is a unit of length equal to one hundredth of a meter. There are 2.54 centimeters in an inch.Abbreviation: cm
Millimeters
A millimeter, or millimetre, is a unit of length equal to one thousandth of a meter.Abbreviation: mm