Convert 21 Millimeters to Centimeters
How long is 21 millimeters? How far is 21 millimeters in centimeters? 21 mm to cm conversion.
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21 Millimeters =
2.1 Centimeters
exact result
Decimal places
Result in Plain English
21 millimeters is equal to exactly 2.1 centimeters.
Result as a Fraction
21 millimeters
= 21⁄10 centimeters
= 2 and 1⁄10 centimeters
In Scientific Notation
21 millimeters
= 2.1 x 101 millimeters
= 2.1 x 100 centimeters
Millimeters
A millimeter, or millimetre, is a unit of length equal to one thousandth of a meter.Abbreviation: mm
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