21 mm equals how many cm?

Answer 1

Inch and centimeter are both linear units of measurement. They are used to measure small distance. The conversion is done by multiplying the inch measurement by 2.54. The above unit in centimeters equals 2.1 cm (Approximately).

Answer 2

21 mm equals 2.1 cm

the conversion between "mm" and "cm" is that 10mm=1cm

so 21mm equals 2.1cm

Answer 3

21 mm is equal to 2.1 cm. To convert millimeters to centimeters, you divide by 10 since there are 10 millimeters in a centimeter.