Watts to Milliwatts Converter
Convert watts (W) to milliwatts (mW), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter a power, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 W = 1000 mW
- 1 × 1000 = 1000 mW
How to convert watts to milliwatts
1 W = 1,000 mW, so multiply by 1,000 to go from watts to milliwatts. Going the other way, 1 mW = 0.001 W.
mW = W × 1,000 W = mW × 0.001
Worked example:
1 W = 1000 mW 5 × 1000 = 5000 mW
Watts to milliwatts table
| Watts | Milliwatts |
|---|---|
| 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 |
| 15 W | 15,000 mW |
| 20 W | 20,000 mW |
| 25 W | 25,000 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 |
| 1000 W | 1,000,000 mW |
About the units
- Watts (W)
- Watts, a metric unit. Definition: BIPM SI Brochure.
- Milliwatts (mW)
- Milliwatts, a metric unit. Definition: BIPM SI Brochure (SI prefixes).