# Convert Millimeters (mm) to Decimeters (dm)

Please provide the values below to convert from Millimeter (mm) to Decimeters (dm) and vice versa.

### What is a Millimeter?

The Millimetre (international spelling; SI unit symbol mm) or millimeter (American spelling) is a unit of length in the metric system, equal to one-thousandth of a meter, which is the SI base unit of length. Therefore, there are one thousand millimeters in a meter and ten millimeters in a centimeter.

### What is a Decimeter?

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

Since a meter is made up of 100 cm, one-tenth of 100 cm is 10 cm. Thus one decimeter measures 10 cm or 3.937 inches

### How to Convert Millimeter to Decimeters?

To convert Millimeter to Decimeters, simply divide the Millimeter value by 100.

The formula used to calculate Millimeter to Decimeters -

d(mm) = d(dm) / 100

The distance d in Decimeters (dm) is equal to the distance d in Millimeters (mm) divided by 100.

### How many Decimeters in a Millimeter

In simple terms, 1 mm is equal to 0.01 dm.

The formula used is 1/100 = 0.01(dm)

### How many Millimeters in a Decimeter

1 Decimeter is equal to 100 Millimeters. So we can also say that there are 100 Millimeters in a Decimeter.

### Millimeter to Decimeters Conversion Table

Millimeter (mm)Decimeter (dm)
0.01 (mm)
0.02 (mm)
0.03 (mm)
0.04 (mm)
0.05 (mm)
1 (mm)
2 (mm)
3 (mm)
4 (mm)
5 (mm)
6 (mm)
7 (mm)
8 (mm)
9 (mm)
10 (mm)
20 (mm)
30 (mm)
40 (mm)
50 (mm)
60 (mm)
70 (mm)
80 (mm)
90 (mm)
100 (mm)
200 (mm)
300 (mm)
400 (mm)
500 (mm)
600 (mm)
700 (mm)
800 (mm)
900 (mm)
1000 (mm)
5000 (mm)
10000 (mm)