Watt to Kilowatt Converter
Convert watts to kilowatts (W to kW) instantly with this free online power converter. Enter any value in the Watt field and get the equivalent in Kilowatt 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 W = 0.001 kW. To convert watts to kilowatts, multiply your Watt value by 0.001. For example, 10 W = 0.01 kW. You can also reverse the calculation: 1 kW = 1000 W.
Quick conversion table
| Watt (W) | Kilowatt (kW) |
|---|---|
| 1 W | 0.001 kW |
| 5 W | 0.005 kW |
| 10 W | 0.01 kW |
| 25 W | 0.025 kW |
| 50 W | 0.05 kW |
| 100 W | 0.1 kW |
Use the swap button to reverse the direction, or choose a different unit from the dropdown menus to convert within the power category.
Formula
Watt to Kilowatt conversion: 1 W = 0.001 kW kilowatts = watts × 0.001 1 kW = 1000 W watts = kilowatts × 1000
Example
Example: Convert 10 W to kW: 10 W × 0.001 = 0.01 kW So, 10 W is about 0.01 kW. To convert back, multiply by 1000: 0.01 kW × 1000 = 10 W.
How to Use
- Enter the value you want to convert in the Watt field
- The result in Kilowatt 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 watts to kilowatts?
Enter the value in Watt (W) in the 'From' field. The equivalent in Kilowatt (kW) 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 W to kW?
1 W = 0.001 kW, so kilowatts = watts × 0.001. To convert back, 1 kW = 1000 W. The full formula and a worked example are shown on this page.
How many kilowatts are in one Watt?
1 W = 0.001 kW.
Is this Watt to Kilowatt 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 kilowatts back to watts?
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 W to kW 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.