Power and Energy
WtokW
Convert watts (W) to kilowatts (kW).
Factor1 W = 0.001 kW
Converter
W
Accepts numbers or expressions, e.g. 150 + 14.7
Result
kW
Rendered to 6 significant figures.
Formula
Formula
kW = W × 0.001
Multiply any value in watts by 0.001 to obtain the value in kilowatts.
Worked example
Convert 1500 W to kW.
- 01Start with 1500 W.
- 02Multiply by the conversion factor: 1500 × 0.001 = 1.5 kW.
Result1500 W = 1.5 kW
Conversion table
| W | kW |
|---|---|
| 1 | 0.001 |
| 2 | 0.002 |
| 5 | 0.005 |
| 10 | 0.01 |
| 20 | 0.02 |
| 50 | 0.05 |
| 100 | 0.1 |
| 200 | 0.2 |
| 500 | 0.5 |
| 1000 | 1 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from W to kW?
1 W equals 0.001 kW. To convert, multiply the value in watts by 0.001.
How do I convert 1 W to kW?
1 W = 0.001 kW. For any value, multiply by 0.001.
How do I convert kW back to W?
Divide by the same factor — or equivalently, multiply by 1000. So 1 kW = 1000 W.
When would I need to convert watt to kilowatt?
Power conversions are common when comparing motor ratings (often kW or hp), thermal duty (BTU/hr or kW), and utility consumption in mixed-unit projects.
Is the conversion exact?
Yes. Both W and kW are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).