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
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.
Hectowatt is 100 watt units.
Result = input x 0.001 / 100.
Electrical units in the same family convert directly.
Reserved above the conversion cards and below the converter.
About Converting Milliwatts to Hectowatts
Milliwatt and Hectowatt 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: 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
120 mW × 0.00001 = 0.0012 hW
120 milliwatts = 0.0012 hectowatts.
Conversion table
| Milliwatt (mW) | Hectowatt (hW) |
|---|---|
| 1 mW | 0.00001 hW |
| 5 mW | 0.00005 hW |
| 12 mW | 0.00012 hW |
| 24 mW | 0.00024 hW |
| 120 mW | 0.0012 hW |
| 240 mW | 0.0024 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 electricity.
What is a hectowatt?
Hectowatt (hW) is a unit of electricity.
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.
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.