Decimeter To Millimeter Conversion Chart

Decimeter (dm) Millimeter (mm)
0.01 dm1 mm
0.1 dm10 mm
1 dm100 mm
2 dm200 mm
5 dm500 mm
10 dm1000 mm
20 dm2000 mm
50 dm5000 mm
100 dm10000 mm
500 dm50000 mm
1000 dm100000 mm

Convert from decimeter to millimeter formula

Total millimeter = Total decimeter x 100

For example, if you want to convert 15 Decimeter to Millimeter then,

15 dm = 15 x 100 = 1500 mm

Convert from millimeter to decimeter formula

Total decimeter =
Total millimeter
1500 mm
= 15 dm


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.


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.