mW to W Converter
Convert mW to W: 1 mW = 0.001 W. Formula, worked example, table of common values and unit definitions.
Result0.5 W
1 mW = 0.001 W
500 mW =
0.5 W
Formula
W = mW × 0.001 mW = W × 1,000
Worked example
- 500 mW × 0.001 = 0.5 W
Common values
| mW | W |
|---|---|
| 1 | 0.001 |
| 10 | 0.01 |
| 100 | 0.1 |
| 500 | 0.5 |
| 1,000 | 1 |
| 5,000 | 5 |
Unit definitions
| Unit | Equals | What it is |
|---|---|---|
| mW | 0.001 W | Milliwatt, a thousandth of a watt. |
| W | 1 W | Watt, one joule per second. The SI unit of power. |
Frequently asked questions
How many W are in one mW?
1 mW = 0.001 W.
What is the formula to convert mW to W?
W = mW × 0.001. To go back, mW = W × 1,000.
Where are milliwatts used?
Milliwatts describe low-power signals and radio transmitters, such as a laser pointer or a wireless module. For radio levels the dBm converter expresses the same power on a logarithmic scale.
Related
Opposite direction: W to mW
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