dm to mm
92 unitsConvert Decimeter to Millimeter (dm to mm)
1 decimeter = 100 millimeters. Convert decimeters to millimeters instantly, with the exact factor, the formula and a reference table of common values.
dm to mm conversion table
| dm | mm |
|---|---|
| 1 dm | 100 mm |
| 2 dm | 200 mm |
| 3 dm | 300 mm |
| 5 dm | 500 mm |
| 10 dm | 1000 mm |
| 20 dm | 2000 mm |
| 50 dm | 5000 mm |
| 100 dm | 10000 mm |
| 250 dm | 25000 mm |
| 500 dm | 50000 mm |
| 1000 dm | 100000 mm |
What is a decimeter?
The decimeter is a metric unit of length. One decimeter equals 0.1 meters, so every conversion on this page starts from that single number. Metric units are built from the meter with a prefix, so moving between them only ever means shifting the decimal point.
Because the whole system works in powers of ten, you can convert decimeters to any other metric unit without memorizing odd numbers. The table further down does the arithmetic for the values people look up most.
In writing, the decimeter is usually shortened to "dm". One decimeter is 0.1 meters, and that ratio is what every figure on this page is built from.