Millimeters to Decimeters
Convert millimeters (mm) to decimeters (dm). Type in either box; the other updates as you go.
How to convert millimeters to decimeters
To convert millimeters to decimeters, multiply the number of millimeters by 0.01.
Example
Convert 100 millimeters to decimeters:
Millimeter to decimeter conversion chart
| Millimeters (mm) | Decimeters (dm) |
|---|---|
| 1 mm | 0.01 dm |
| 2 mm | 0.02 dm |
| 3 mm | 0.03 dm |
| 4 mm | 0.04 dm |
| 5 mm | 0.05 dm |
| 6 mm | 0.06 dm |
| 7 mm | 0.07 dm |
| 8 mm | 0.08 dm |
| 9 mm | 0.09 dm |
| 10 mm | 0.1 dm |
| 12 mm | 0.12 dm |
| 15 mm | 0.15 dm |
| 20 mm | 0.2 dm |
| 25 mm | 0.25 dm |
| 30 mm | 0.3 dm |
| 40 mm | 0.4 dm |
| 50 mm | 0.5 dm |
| 60 mm | 0.6 dm |
| 70 mm | 0.7 dm |
| 75 mm | 0.75 dm |
| 80 mm | 0.8 dm |
| 90 mm | 0.9 dm |
| 100 mm | 1 dm |
| 150 mm | 1.5 dm |
| 200 mm | 2 dm |
| 250 mm | 2.5 dm |
| 500 mm | 5 dm |
| 1,000 mm | 10 dm |
Going the other way? See the decimeters to millimeters chart.
About the units
Millimeter (mm)
A millimeter is one thousandth of a meter. It is the unit on engineering drawings, rainfall gauges and the small marks of a metric ruler.
Decimeter (dm)
A decimeter is one tenth of a meter, or 10 centimeters. A cube one decimeter on each side holds exactly one liter.
Frequently asked questions
How many decimeters are in a millimeter?
There are 0.01 decimeters in a millimeter.
How many millimeters are in a decimeter?
There are 100 millimeters in a decimeter.
How do you convert millimeters to decimeters?
To convert millimeters to decimeters, multiply the number of millimeters by 0.01.
What is 100 millimeters in decimeters?
100 millimeters equals 1 decimeter.
Convert between metric and imperial units of length and distance, from millimeters to miles. Open the length converter to see a value in every unit at once.