Formula
mW to W conversion formula
Use this relationship for a direct conversion:
W = mW x 0.001
Worked example
2 mW = 0.002 W.
Horsepower type is always identified because mechanical and metric horsepower differ by about 1.4 percent.
Power conversion
Convert Milliwatt to Watt
1 milliwatt (mW) equals 0.001 watt (W). Enter any value below to convert from mW to W.
Enter a value and choose units. Results update instantly.
1 mW = 0.001 W
All Power units
From 1 mW| Unit | Value |
|---|---|
| Watt W | 0.001 |
| Kilowatt kW | 0.000001 |
| Megawatt MW | 0.000000001 |
| Milliwatt mW | 1 |
| Mechanical horsepower hp(I) | 0.000001341 |
| Metric horsepower PS | 0.0000013596 |
| BTU (IT) per hour BTU/h | 0.0034121416 |
| Foot-pound per second ft·lb/s | 0.0007375621 |
Recent conversions
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Quick reference
Milliwatt to Watt table
| Milliwatt (mW) | Watt (W) |
|---|---|
| 0.01 | 0.00001 |
| 0.1 | 0.0001 |
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 1,000 | 1 |
From unit
About the milliwatt
One thousandth of a watt.
Symbol: mW
To unit
About the watt
One joule per second.
Symbol: W
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Related conversions
Source
Conversion standard
Definitions are checked against NIST SP 811: Power units. Calculations use full internal precision before display rounding.
View the complete power converterQuestions
mW to W FAQ
How do you convert milliwatt to watt?
Use the formula W = mW x 0.001. 1 milliwatt (mW) equals 0.001 watt (W).
Is the mW to W conversion exact?
Both unit definitions use exact factors. Only the displayed decimal may be rounded.