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
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
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.
Power units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Deciwatts to Milliwatts
Deciwatt and Milliwatt both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. 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
100 dW × 100 = 10,000 mW
100 deciwatts = 10,000 milliwatts.
Conversion table
| Deciwatt (dW) | Milliwatt (mW) |
|---|---|
| 1 dW | 100 mW |
| 10 dW | 1,000 mW |
| 50 dW | 5,000 mW |
| 100 dW | 10,000 mW |
| 500 dW | 50,000 mW |
| 1,000 dW | 100,000 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 engineering.
What is a milliwatt?
Milliwatt (mW) is a unit of engineering.
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.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.