How to Convert Watts to Milliwatts
To convert from watts to milliwatts, multiply the value by 1000. The conversion is linear, meaning doubling the input doubles the output.
Conversion Formula
- Watts to Milliwatts:
mW = W × 1,000 - Milliwatts to Watts:
W = mW ÷ 1,000
Watts to Milliwatts Conversion Chart
| Watts (W) | Milliwatts (mW) |
|---|---|
| 0.1 | 100 |
| 0.25 | 250 |
| 0.5 | 500 |
| 1 | 1000 |
| 2 | 2000 |
| 3 | 3000 |
| 5 | 5000 |
| 10 | 10000 |
| 20 | 20000 |
| 25 | 25000 |
| 50 | 50000 |
| 100 | 100000 |
| 250 | 250000 |
| 1000 | 1000000 |
Understanding the Units
What is a Watt?
The watt is the SI derived unit of power, equal to one joule per second (1 W = 1 J/s = 1 V·A).
Named after James Watt (1736–1819), the Scottish engineer whose improvements to the steam engine helped drive the Industrial Revolution.
Common contexts: electricity, mechanics, lighting.
What is a Milliwatt?
A milliwatt equals one thousandth of a watt (10⁻³ W).
Common contexts: radio transmitters, lasers, electronics.
Real-World Reference Points
| Item | Watts (W) | Milliwatts (mW) |
|---|---|---|
| LED bulb | 9 | 9000 |
| Incandescent bulb (old) | 60 | 60000 |
| Microwave oven | 1000 | 1000000 |