Dm is the unit of length of decimeter. Decimeter is abbreviated as dm, which means decimeter. Ldm( 1 decimeter) =10cm (10cm):1m (1m) =10dm (10min).

In practical application, dm is usually used to measure short distances or lengths, such as room area and item size. Different from other length units, dm is rarely used, and it is more common to use its multiples or fractions to express specific length values.