Decimetre

decimetre
A standard CD is 120 millimetres (1.2 decimetres) in diameter.
General information
Unit system	SI
Unit of	length
Symbol	dm
Conversions
1 dm in ...	... is equal to ...
SI base units	0.1 m
imperial/US units	3.9370 in

The decimetre (decimeter in American English; symbol: dm) is a unit of length in the International System of Units, equal to one tenth of a metre, ten centimetres, one hundred millimetres, and 3.937 inches.¹

The common non-SI metric unit of volume, the litre, is defined as one cubic decimetre, although, from 1901 to 1964, there was a slight difference between the two due to the litre being defined using the kilogram rather than the metre.

The path length when measuring a chemical compound's specific rotation is measured in decimetres.

Markings of a ship's draught are shown in decimetres in most of the world.