Deciwatt is 0.1 watt units.
Deciwatts to Milliwatts Converter — dW to mW
Convert Deciwatt (dW) to Milliwatt (mW) using the exact conversion factor (1 deciwatt = 100 milliwatt). See the formula, worked examples, and conversion table.
Deciwatts to Milliwatts converter
Converter
Electricity Converter
Convert electrical units by family and calculate voltage, current, resistance, power, and energy with context values.
Context values
Some unit families need one extra value for a physically accurate result.
Milliwatt is 0.001 watt units.
Result = input x 0.1 / 0.001.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Deciwatts to Milliwatts
Deciwatt and Milliwatt both belong to the electricity family — voltage, current, resistance, power, or energy — units that show up constantly when working across the different standards used by household wiring (120V/240V depending on region), automotive electrical systems (12V/24V), and electronics design. Specifically: Deciwatt is 0.1 watt units, and milliwatt is 0.001 watt units.
Formula
milliwatts = deciwatts × 100
This factor comes from each unit's defined relationship to the category's base unit: 1 deciwatt equals 0.1 base units, and 1 milliwatt equals 0.001 base units, so dividing one by the other gives the direct deciwatt-to-milliwatt factor of 100.
Simple example
1 dW × 100 = 100 mW
1 deciwatt = 100 milliwatts.
Real-world example
120 dW × 100 = 12,000 mW
120 deciwatts = 12,000 milliwatts.
Conversion table
| Deciwatt (dW) | Milliwatt (mW) |
|---|---|
| 1 dW | 100 mW |
| 5 dW | 500 mW |
| 12 dW | 1,200 mW |
| 24 dW | 2,400 mW |
| 120 dW | 12,000 mW |
| 240 dW | 24,000 mW |
Reverse conversion: Milliwatt to Deciwatt
100 mW × 0.01 = 1 dW
100 milliwatts = 1 deciwatt.
deciwatts = milliwatts × 0.01
For a page dedicated to this direction, see Milliwatt to Deciwatt.
Understanding the Deciwatt (dW)
Deciwatt is 0.1 watt units.
Understanding the Milliwatt (mW)
Milliwatt is 0.001 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many milliwatts are in 1 deciwatt?
1 deciwatt equals 100 milliwatts, using the exact defined conversion factor rather than an estimate.
How do I convert deciwatt to milliwatt?
Multiply the deciwatt value by 100. The converter above does this instantly to whatever precision you set.
How do I convert milliwatt back to deciwatt?
Use the reverse factor: 1 milliwatt equals 0.01 deciwatts. You can also use the swap control in the converter above to flip the direction instantly.
What is a deciwatt?
Deciwatt (dW) is a unit of electricity.
What is a milliwatt?
Milliwatt (mW) is a unit of electricity.
Is the deciwatt to milliwatt conversion exact?
Yes. Both deciwatt and milliwatt are defined by fixed standards rather than physical artifacts, so the factor of 100 used above is exact to as many digits as you choose to display.
What's the difference between voltage, current, and resistance?
Voltage (volts) is the electrical potential difference driving current through a circuit. Current (amperes) is the rate of flow of electric charge. Resistance (ohms) is how much a component opposes that flow. They're related by Ohm's law (V = I × R), but they are distinct physical quantities, and this page converts between units of just one of them.