Convert Milliwatts to Watts
Convert milliwatts to watts instantly. Type a value below, check the formula and table, then see how the same mW to W conversion looks as a single line in Notes Calculator.
Milliwatts to Watts formula
One milliwatt is 0.001 watts, so W = mW × 0.001. For the reverse, multiply watts by 1,000, or use the Watts to Milliwatts converter.
Milliwatts to Watts conversion table
| Milliwatts (mW) | Watts (W) |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 25 | 0.025 |
| 50 | 0.05 |
| 100 | 0.1 |
| 250 | 0.25 |
| 500 | 0.5 |
| 1,000 | 1 |
Milliwatts to Watts in Notes Calculator
Notes Calculator is a notepad that does math. Write 100 mW to W on any line and the answer appears beside it. Change the number and the result follows. The same works with in and as, and with values stored in variables, so a whole estimate can mix milliwatts and watts without a separate converter.
| Note | Result |
|---|---|
| 100 mW to W | 0.10 W |
| 100 mW in W | 0.10 W |
| 10 W as mW | 10,000 mW |
See the unit conversion docs for mixing units in one expression, or open the free web app and try it.
FAQ
Frequently asked questions
- One milliwatt equals 0.001 watts. To convert milliwatts to watts, multiply by 0.001; to go back, multiply by 1,000.
- Type the value, the unit, and the target unit on one line: 100 mW to W. The keywords to, in, and as all work, and the result updates as you type. You can also keep the value in a variable and convert it later.
- Yes. The converter on this page is free, and Notes Calculator has a free plan for the web, Mac, Windows, Linux, and Android with the same unit conversions built in.
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