Milliwatt to Watt Converter
Convert milliwatts to watts (mW to W) instantly with this free online power converter. Enter any value in the Milliwatt field and get the equivalent in Watt immediately. This converter handles any quantity — from tiny fractions to large numbers — with full precision. No signup, no ads in the widget, and the conversion runs entirely in your browser for instant results.
The conversion factor is exact: 1 mW = 0.001 W. To convert milliwatts to watts, multiply your Milliwatt value by 0.001. For example, 10 mW = 0.01 W. You can also reverse the calculation: 1 W = 1000 mW.
Quick conversion table
| Milliwatt (mW) | Watt (W) |
|---|---|
| 1 mW | 0.001 W |
| 5 mW | 0.005 W |
| 10 mW | 0.01 W |
| 25 mW | 0.025 W |
| 50 mW | 0.05 W |
| 100 mW | 0.1 W |
Use the swap button to reverse the direction, or choose a different unit from the dropdown menus to convert within the power category.
Formula
Milliwatt to Watt conversion: 1 mW = 0.001 W watts = milliwatts × 0.001 1 W = 1000 mW milliwatts = watts × 1000
Example
Example: Convert 10 mW to W: 10 mW × 0.001 = 0.01 W So, 10 mW is about 0.01 W. To convert back, multiply by 1000: 0.01 W × 1000 = 10 mW.
How to Use
- Enter the value you want to convert in the Milliwatt field
- The result in Watt appears instantly below
- Use the dropdown menus to change units if needed
- Click 'Swap Units' to reverse the conversion direction
- Copy the result or adjust the input for a new conversion
Frequently Asked Questions
How do I convert milliwatts to watts?
Enter the value in Milliwatt (mW) in the 'From' field. The equivalent in Watt (W) appears instantly in the 'To' field. The converter uses precise conversion factors and updates in real time as you type.
What is the formula to convert mW to W?
1 mW = 0.001 W, so watts = milliwatts × 0.001. To convert back, 1 W = 1000 mW. The full formula and a worked example are shown on this page.
How many watts are in one Milliwatt?
1 mW = 0.001 W.
Is this Milliwatt to Watt converter free?
Yes, completely free with no signup, no limits, and no ads in the converter widget. You can convert as many values as you need. The tool runs entirely in your browser, so your data never leaves your device.
Can I convert watts back to milliwatts?
Yes. Click the 'Swap Units' button to reverse the direction. You can also use the dropdown menus to select any other power unit for either field.
How accurate is the mW to W conversion?
The converter uses high-precision conversion factors (up to 8 decimal places). Results are displayed with up to 6 decimal places, with trailing zeros removed for readability. For scientific or engineering work, always verify with official standards.