A decimetre (American spelling: decimeter, symbol dm)'s a unit of length in the metric system, equal to one tenth of a metre, the current SI base unit of length. In simple words there're 10 cm in a decimetre. It can be written in scientific notations as 100×10-3 m (engineering notation) or (exponential notation) — meaning or respectively. The c's pronounced as /s/, unlike in decametre. It should be noted that a cubic decimetre, which's a measurement of volume,'s equivalent to one li… (More on Decimetre)