Online calculator to convert watts to milliwatts (W to mW) with formulas, examples, and tables. Our conversions provide a quick and easy way to convert between Power or Electricity units.
Conversion Calculator
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Convert watts to milliwatts
TIP: If the result of your conversion is 0, try increasing the "Decimals".
Conversion Definitions
The following is a list of definitions relating to conversions between watts and milliwatts.
What is a watt (W)?
A watt is a unit of power in the International System of Units (SI). The symbol for watt is W. There are 0.001 watts in a milliwatt.
What is a milliwatt (mW)?
A milliwatt is a unit of power in the International System of Units (SI). The symbol for milliwatt is mW. There are 1,000 milliwatts in a watt.
Conversion Formula
Let's take a closer look at the conversion formula so that you can do these conversions yourself with a calculator or with an old-fashioned pencil and paper.
The formula to convert from watts to milliwatts is:
milliwatts = watts x 1,000
Conversion Example
Next, let's look at an example showing the work and calculations that are involved in converting from watts to milliwatts (W to mW).
Watt to Milliwatt Conversion Example
Task: Convert 18 watts to milliwatts (show work) Formula: watts x 1,000 = milliwatts Calculations: 18 watts x 1,000 = 18,000 milliwatts Result: 18 watts is equal to 18,000 milliwatts
Conversion Table
For quick reference purposes, below is a conversion table that you can use to convert from watts to milliwatts.
Watts to Milliwatts Conversion Chart
| watts (W) | milliwatts (mW) |
|---|---|
| 1 W | 1,000 mW |
| 2 W | 2,000 mW |
| 3 W | 3,000 mW |
| 4 W | 4,000 mW |
| 5 W | 5,000 mW |
| 6 W | 6,000 mW |
| 7 W | 7,000 mW |
| 8 W | 8,000 mW |
| 9 W | 9,000 mW |
| 10 W | 10,000 mW |
| 20 W | 20,000 mW |
| 30 W | 30,000 mW |
| 40 W | 40,000 mW |
| 50 W | 50,000 mW |
| 75 W | 75,000 mW |
| 100 W | 100,000 mW |
| 250 W | 250,000 mW |
| 500 W | 500,000 mW |
| 750 W | 750,000 mW |
| 1,000 W | 1,000,000 mW |
| 2,500 W | 2,500,000 mW |
| 5,000 W | 5,000,000 mW |
| 7,500 W | 7,500,000 mW |
| 10,000 W | 10,000,000 mW |
| 25,000 W | 25,000,000 mW |
| 50,000 W | 50,000,000 mW |
| 75,000 W | 75,000,000 mW |
| 100,000 W | 100,000,000 mW |
| 250,000 W | 250,000,000 mW |
Related Units
The following tables provides a summary of the Power or Electricity units within their respective measurement systems.
Electric Current Units
| Unit | Symbol | Measurement System |
|---|---|---|
| milliamperes ("milliamps") | mA | International System of Units (SI) |
| amperes ("amps") | A | International System of Units (SI) |
Electric Potential Units
| Unit | Symbol | Measurement System |
|---|---|---|
| nanovolts | nV | International System of Units (SI) |
| millivolts | mV | International System of Units (SI) |
| volts | V | International System of Units (SI) |
| kilovolts | kV | International System of Units (SI) |
Power Units
| Unit | Symbol | Measurement System |
|---|---|---|
| nanowatts | nW | International System of Units (SI) |
| microwatts | μW | International System of Units (SI) |
| milliwatts | mW | International System of Units (SI) |
| watts | W | International System of Units (SI) |
| decawatts | daW | International System of Units (SI) |
| hectowatts | hW | International System of Units (SI) |
| kilowatts | kW | International System of Units (SI) |
| megawatts | MW | International System of Units (SI) |
| gigawatts | GW | International System of Units (SI) |
| terawatts | TW | International System of Units (SI) |
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