Milliwatt is 0.001 watt units.
Milliwatts to Hectowatts Converter — mW to hW
Convert Milliwatt (mW) to Hectowatt (hW) using the exact conversion factor (1 milliwatt = 0.00001 hectowatt). See the formula, worked examples, and conversion table.
Milliwatts to Hectowatts 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.
Hectowatt is 100 watt units.
Result = input x 0.001 / 100.
Power units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Milliwatts to Hectowatts
Milliwatt and Hectowatt 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: Milliwatt is 0.001 watt units, and hectowatt is 100 watt units.
Formula
hectowatts = milliwatts × 0.00001
This factor comes from each unit's defined relationship to the category's base unit: 1 milliwatt equals 0.001 base units, and 1 hectowatt equals 100 base units, so dividing one by the other gives the direct milliwatt-to-hectowatt factor of 0.00001.
Simple example
1 mW × 0.00001 = 0.00001 hW
1 milliwatt = 0.00001 hectowatts.
Real-world example
100 mW × 0.00001 = 0.001 hW
100 milliwatts = 0.001 hectowatts.
Conversion table
| Milliwatt (mW) | Hectowatt (hW) |
|---|---|
| 1 mW | 0.00001 hW |
| 10 mW | 0.0001 hW |
| 50 mW | 0.0005 hW |
| 100 mW | 0.001 hW |
| 500 mW | 0.005 hW |
| 1,000 mW | 0.01 hW |
Reverse conversion: Hectowatt to Milliwatt
0.00001 hW × 100000 = 1 mW
0.00001 hectowatts = 1 milliwatt.
milliwatts = hectowatts × 100000
For a page dedicated to this direction, see Hectowatt to Milliwatt.
Understanding the Milliwatt (mW)
Milliwatt is 0.001 watt units.
Understanding the Hectowatt (hW)
Hectowatt is 100 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many hectowatts are in 1 milliwatt?
1 milliwatt equals 0.00001 hectowatts, using the exact defined conversion factor rather than an estimate.
How do I convert milliwatt to hectowatt?
Multiply the milliwatt value by 0.00001. The converter above does this instantly to whatever precision you set.
How do I convert hectowatt back to milliwatt?
Use the reverse factor: 1 hectowatt equals 100,000 milliwatts. You can also use the swap control in the converter above to flip the direction instantly.
What is a milliwatt?
Milliwatt (mW) is a unit of engineering.
What is a hectowatt?
Hectowatt (hW) is a unit of engineering.
Is the milliwatt to hectowatt conversion exact?
Yes. Both milliwatt and hectowatt are defined by fixed standards rather than physical artifacts, so the factor of 0.00001 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.