Millimeter To Decimeter Conversion Chart

Millimeter (mm) Decimeter (dm)
0.01 mm0.0001 dm
0.1 mm0.001 dm
1 mm0.01 dm
2 mm0.02 dm
5 mm0.05 dm
10 mm0.1 dm
20 mm0.2 dm
50 mm0.5 dm
100 mm1 dm
500 mm5 dm
1000 mm10 dm


A millimeter is the smallest unit. There are 10 mm in one centimeter, if an object is smaller than one centimeter, you would use millimeters. A scientist measuring something under a magnifying glass might use millimeters to represent a tiny specimen.


The decimetre (SI symbol dm) is a unit of length in the metric system. The term “Deci” means one-tenth, and therefore decimetre means one-tenth of a meter.