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A standard CD is 120 millimetres (1.2 decimetres) in diameter.
General information
Unit systemSI
Unit oflength
1 dm in ...... is equal to ...
   SI base units   0.1 m
   imperial/US units   0.32808 ft
 3.9370 in

The decimetre (or 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.

Markings of a ship's draft are shown in decimeters in most of the world.

See also


  1. ^ "decimeter - Dictionary Definition". Retrieved 2021-01-03.

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