1 dm = 100 mm
1 Decimeter (dm) = 100 Millimeter (mm).
If you want to reverse convert, use Millimeter → Decimeter. 1 mm = 0.01 dm. You can also explore the full Length converter page for more cross conversions.
Conversion formula
Decimeter to Millimeter formula: value in mm = value in dm × 100.
Millimeter to Decimeter formula: value in dm = value in mm × 0.01.
How to convert Decimeter to Millimeter
To convert Decimeter to Millimeter, multiply the value in dm by 100. This gives the result in mm.
For example, 1 dm = 100 mm and 10 dm = 1000 mm.
What is Decimeter?
Decimeter (dm): One tenth of a metre. It bridges centimetres and metres in school measurements and appears in volume calculations using cubic decimetres. 1 dm = 10 cm = 0.1 m.
What is Millimeter?
Millimeter (mm): One thousandth of a metre. Screw diameters, sheet thicknesses and small dimensions on technical drawings commonly use this finer scale. 1 mm = 0.1 cm = 0.001 m.
FAQ
How many millimeter are in 1 decimeter?
There are 100 mm in 1 dm.
Why can conversion results differ slightly?
Check the unit definition and rounding. US and imperial measures can differ; rounding intermediate values can also change the final digits.
How do I convert decimeter to millimeter?
Multiply the value in dm by 100 to get the value in mm.
Decimeter → other Length units
- 1 decimeter → meter = 0.1 meter
- 1 decimeter → kilometer = 0.0001 kilometer
- 1 decimeter → centimeter = 10 centimeter
- 1 decimeter → millimeter = 100 millimeter
- 1 decimeter → micrometer = 100000 micrometer
- 1 decimeter = 100000000 nanometer
- 1 decimeter = 100000000000 picometer
- 1 decimeter → nautical mile = 5.3995680345572E-5 nautical mile
- 1 decimeter → mile = 6.2137119223733E-5 mile
- 1 decimeter → fathom = 0.054680664916885 fathom
- 1 decimeter → yard = 0.10936132983377 yard
- 1 decimeter → feet = 0.32808398950131 feet
- 1 decimeter → inch = 3.9370078740157 inch
- 1 decimeter → hand = 0.98425196850394 hand
- 1 decimeter = 6.6845871222684E-13 astronomical unit
- 1 decimeter = 1.0570008340246E-17 lightyear
- 1 decimeter = 3.2407792894443E-18 parsec
Decimeter → Millimeter Table
The table below shows common values from Decimeter to Millimeter and the reverse direction for quick reference.
| dm | mm | Rounded |
|---|---|---|
| 1 dm | 100 mm | 100.0000 |
| 2 dm | 200 mm | 200.0000 |
| 3 dm | 300 mm | 300.0000 |
| 4 dm | 400 mm | 400.0000 |
| 5 dm | 500 mm | 500.0000 |
| 10 dm | 1000 mm | 1000.0000 |
| 12 dm | 1200 mm | 1200.0000 |
| 15 dm | 1500 mm | 1500.0000 |
| 20 dm | 2000 mm | 2000.0000 |
| 25 dm | 2500 mm | 2500.0000 |
| 30 dm | 3000 mm | 3000.0000 |
| 40 dm | 4000 mm | 4000.0000 |
| 50 dm | 5000 mm | 5000.0000 |
| 75 dm | 7500 mm | 7500.0000 |
| 100 dm | 10000 mm | 10000.0000 |
| 200 dm | 20000 mm | 20000.0000 |
| 250 dm | 25000 mm | 25000.0000 |
| 500 dm | 50000 mm | 50000.0000 |
| 750 dm | 75000 mm | 75000.0000 |
| 1000 dm | 100000 mm | 100000.0000 |
| 2500 dm | 250000 mm | 250000.0000 |
| 5000 dm | 500000 mm | 500000.0000 |
| 10000 dm | 1000000 mm | 1000000.0000 |
Millimeter → Decimeter Table
| mm | dm | Rounded |
|---|---|---|
| 1 mm | 0.01 dm | 0.0100 |
| 2 mm | 0.02 dm | 0.0200 |
| 3 mm | 0.03 dm | 0.0300 |
| 4 mm | 0.04 dm | 0.0400 |
| 5 mm | 0.05 dm | 0.0500 |
| 10 mm | 0.1 dm | 0.1000 |
| 12 mm | 0.12 dm | 0.1200 |
| 15 mm | 0.15 dm | 0.1500 |
| 20 mm | 0.2 dm | 0.2000 |
| 25 mm | 0.25 dm | 0.2500 |
| 30 mm | 0.3 dm | 0.3000 |
| 40 mm | 0.4 dm | 0.4000 |
| 50 mm | 0.5 dm | 0.5000 |
| 75 mm | 0.75 dm | 0.7500 |
| 100 mm | 1 dm | 1.0000 |
| 200 mm | 2 dm | 2.0000 |
| 250 mm | 2.5 dm | 2.5000 |
| 500 mm | 5 dm | 5.0000 |
| 750 mm | 7.5 dm | 7.5000 |
| 1000 mm | 10 dm | 10.0000 |
| 2500 mm | 25 dm | 25.0000 |
| 5000 mm | 50 dm | 50.0000 |
| 10000 mm | 100 dm | 100.0000 |
Millimeter → Decimeter
The reverse value is 1 mm = 0.01 dm.