The decimetre (British English) or decimeter (American English); SI symbol dm) is a unit of length in the metric system, equal to one tenth of a metre, the International System of Units base unit of length. It is equal to ten centimetres and 10 decimetres equal a metre. One decimetre is equivalent to 3.93700787 inches.
It can be written in scientific notation as 100×10−3 m (engineering notation) or 1 E-1 m (exponential notation) — meaning 100 × 1 mm or 0.1 m respectively. The c is pronounced as /s/, unlike in decametre. The common non-SI metric unit of volume, the litre, is defined as one cubic decimetre (however, from 1901 to 1964, there was a slight difference between the two due to the litre being defined with respect to the kilogram rather than the metre).
To help compare different orders of magnitude this page lists lengths between 10 centimetres and 100 centimetres (10−1 metre and 1 metre).
Distances shorter than 10 centimetres
10 centimetres (abbreviated to 10 cm) is equal to: