# Convert Millimeters to Decimeters

## How to use the converter

To convert mm to dm enter the value in the field below and select the target unit, the value will be displayed below:

Value:
From:
To:
Decimal places:

=

## Conversion Tables

Metric
Kilometer (km)
Meter (m)
Decimeter (dm)
Centimeter (cm)
Millimeter (mm)
Micrometer (µm)
Nanometer (nm)
Angstrom (Å)
Astronomical
Parsec (pc)
Light-year
Astronomical unit (AU)
Light-minute
Light-second
British/American
League
Mile (mi)
Furlong
Chain
Rod (rd)
Yard (yd)
Foot (ft)
Hand
Inch (in)
Line
Thousandth (mil)
Thou (thou)
Nautical
Nautical mile
Fathom

## How to perform key conversions involving length measurements

The formulas for conversion are represented below:

### Millimeters to Decimeters Formula

dm = mm / 100

Example: 30 Millimeters in Decimeters:

dm = mm / 100

dm = 30 / 100

dm = 0.3

### Decimeters to Millimeters Formula

mm = dm * 100

Example: 1.5 Decimeters in Millimeters:

mm = dm * 100

mm = 1.5 * 100

mm = 150

## Frequently asked questions involving length and distance

### 100 Millimeters are equal to how many Decimeters

Considering that 1 Millimeter is equivalent to 0.01 Decimeters, you can use a rule of three to obtain that 100 Millimeters equal 1 Decimeter.

1 mm - 0.01 dm

100 mm - x

Apply the rule of three and get:

x mm = 1 dmmm

x = 1 dm

### 100 Decimeters is equal to how many Millimeters?

If every 1 Decimeter we have 100 Millimeters, just multiply the number of Decimeters (100) by 100, so you will get that 100 dm equals 10,000 mm. Observe the calculation below:

mm = dm * 100

mm = 100 * 100

mm = 10000