Watts ↔ Kilowatts
Convert between watts and kilowatts
Watts ↔ Kilowatts
Quick Facts
- •1 kW = 1,000 watts
- •1 horsepower ≈ 746 watts
- •Average US home peak demand: ~5 kW
- •LED bulb: ~10W vs incandescent: ~60W
Watts and Kilowatts
A watt (W) is the SI unit of power — the rate of energy transfer. One kilowatt (kW) equals 1,000 watts. Watts are used for small appliances and light bulbs, while kilowatts are used for larger loads like air conditioners, electric vehicles, and solar panel systems.
Common Power Ratings
LED bulb: 10W, laptop: 65W, microwave: 1,000W (1 kW), hair dryer: 1,800W (1.8 kW), electric car charger: 7–22 kW, Tesla Supercharger: 250 kW. Solar panels for homes typically range from 5–10 kW systems.
How to convert Watts to Kilowatts
To convert watts to kilowatts, multiply the number of watts by the conversion factor. The exact factor is 0.001.
Formula
Kilowatts = Watts × 0.001
Worked example
Convert 10 W to kW: 10 W = 0.01 kW.
Watts to Kilowatts reference table
Use this quick lookup for common watts to kilowatts values.
| Watts (W) | Kilowatts (kW) |
|---|---|
| 1 W | 0.001 kW |
| 2 W | 0.002 kW |
| 5 W | 0.005 kW |
| 10 W | 0.01 kW |
| 20 W | 0.02 kW |
| 25 W | 0.025 kW |
| 50 W | 0.05 kW |
| 75 W | 0.075 kW |
| 100 W | 0.1 kW |
| 250 W | 0.25 kW |
Frequently asked questions
What is the formula to convert Watts to Kilowatts?
Multiply the number of watts by 0.001 to get kilowatts. For example, 10 W equals 0.01 kW.
How many kilowatts are in 1 watt?
1 W equals 0.001 kW.
How do I convert kilowatts back to watts?
Reverse the formula: Watts = Kilowatts ÷ 0.001. For example, 100 kW equals 100,000 W.
Is this Watts to Kilowatts converter accurate?
Yes. Conversions use the internationally accepted ratio for watts and kilowatts and are calculated to 4 decimal places in your browser.
What is 10 W in kW?
10 W equals 0.01 kW.
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This calculator is for educational and reference purposes only. Always verify critical calculations independently.