Watts to Milliwatts Converter
Convert watts (W) to milliwatts (mW)
Result
1,000 mW
Milliwatts
1 W = 1,000 mW
1 W in other units
- 1Enter a valueType the number to convert
- 2Pick the unitsChoose what to convert from and to
- 3Read the resultSee it in every other unit too
How to convert watts to milliwatts
One watt equals 1,000 milliwatts, so multiply the number of watts by 1,000.
mW = W × 1,000
1 W = 1,000 mW · 1 mW = 0.001 W
Worked example
To convert 5 watts to milliwatts: 5 W × 1,000 = 5,000 mW.
About watts (W)
The watt is the SI unit of power: one joule per second. Bulbs and appliances are rated in watts.
About milliwatts (mW)
A milliwatt is one thousandth of a watt, used for lasers and small electronics.
More conversions
Watts to other units
Frequently asked questions
How many milliwatts are in one watt?
One watt equals 1,000 milliwatts.
How many watts are in one milliwatt?
One milliwatt equals 0.001 watts.
How do I convert watts to milliwatts?
Use the formula mW = W × 1,000. For example, 5 W × 1,000 = 5,000 mW.