1 mW = 0.001 W
1 Milliwatt (mW) = 0.001 Watt (W).
If you want to reverse convert, use Watt → Milliwatt. 1 W = 1000 mW. You can also explore the full Power converter page for more cross conversions.
Conversion formula
Milliwatt to Watt formula: value in W = value in mW × 0.001.
Watt to Milliwatt formula: value in mW = value in W × 1000.
How to convert Milliwatt to Watt
To convert Milliwatt to Watt, multiply the value in mW by 0.001. This gives the result in W.
For example, 1 mW = 0.001 W and 10 mW = 0.01 W.
What is Milliwatt?
Milliwatt (mW): Useful for small electronic loads and optical power. 1 mW = 0.001 W.
What is Watt?
Watt (W): Describes energy transferred each second, such as an appliance’s power draw. 1 W = 1 J/s.
FAQ
How many watt are in 1 milliwatt?
There are 0.001 W in 1 mW.
Why can conversion results differ slightly?
Check the unit definition and rounding. US and imperial measures can differ; rounding intermediate values can also change the final digits.
How do I convert milliwatt to watt?
Multiply the value in mW by 0.001 to get the value in W.
Milliwatt → other Power units
- 1 milliwatt → watt = 0.001 watt
- 1 milliwatt = 1.0E-6 kilowatt
- 1 milliwatt = 1.0E-9 megawatt
- 1 milliwatt = 1.341022089595E-6 horsepower
- 1 milliwatt → btu per hour = 0.0034121416331279 btu per hour
Milliwatt → Watt Table
The table below shows common values from Milliwatt to Watt and the reverse direction for quick reference.
| mW | W | Rounded |
|---|---|---|
| 1 mW | 0.001 W | 0.0010 |
| 2 mW | 0.002 W | 0.0020 |
| 3 mW | 0.003 W | 0.0030 |
| 4 mW | 0.004 W | 0.0040 |
| 5 mW | 0.005 W | 0.0050 |
| 10 mW | 0.01 W | 0.0100 |
| 12 mW | 0.012 W | 0.0120 |
| 15 mW | 0.015 W | 0.0150 |
| 20 mW | 0.02 W | 0.0200 |
| 25 mW | 0.025 W | 0.0250 |
| 30 mW | 0.03 W | 0.0300 |
| 40 mW | 0.04 W | 0.0400 |
| 50 mW | 0.05 W | 0.0500 |
| 75 mW | 0.075 W | 0.0750 |
| 100 mW | 0.1 W | 0.1000 |
| 200 mW | 0.2 W | 0.2000 |
| 250 mW | 0.25 W | 0.2500 |
| 500 mW | 0.5 W | 0.5000 |
| 750 mW | 0.75 W | 0.7500 |
| 1000 mW | 1 W | 1.0000 |
| 2500 mW | 2.5 W | 2.5000 |
| 5000 mW | 5 W | 5.0000 |
| 10000 mW | 10 W | 10.0000 |
Watt → Milliwatt Table
| W | mW | Rounded |
|---|---|---|
| 1 W | 1000 mW | 1000.0000 |
| 2 W | 2000 mW | 2000.0000 |
| 3 W | 3000 mW | 3000.0000 |
| 4 W | 4000 mW | 4000.0000 |
| 5 W | 5000 mW | 5000.0000 |
| 10 W | 10000 mW | 10000.0000 |
| 12 W | 12000 mW | 12000.0000 |
| 15 W | 15000 mW | 15000.0000 |
| 20 W | 20000 mW | 20000.0000 |
| 25 W | 25000 mW | 25000.0000 |
| 30 W | 30000 mW | 30000.0000 |
| 40 W | 40000 mW | 40000.0000 |
| 50 W | 50000 mW | 50000.0000 |
| 75 W | 75000 mW | 75000.0000 |
| 100 W | 100000 mW | 100000.0000 |
| 200 W | 200000 mW | 200000.0000 |
| 250 W | 250000 mW | 250000.0000 |
| 500 W | 500000 mW | 500000.0000 |
| 750 W | 750000 mW | 750000.0000 |
| 1000 W | 1000000 mW | 1000000.0000 |
| 2500 W | 2500000 mW | 2500000.0000 |
| 5000 W | 5000000 mW | 5000000.0000 |
| 10000 W | 10000000 mW | 10000000.0000 |
Watt → Milliwatt
The reverse value is 1 W = 1000 mW.