1 W equals 0.001 kW. To convert W to kW, multiply the value by 0.001; divide by 0.001 to convert back. Enter any number above and the result appears instantly — free and entirely in your browser.
How do you convert W to kW?
The conversion formula is kW = W × 0.001. The conversion factor is fixed by definition, so the result is always exact.
W to kW conversion table
| W | kW |
|---|---|
| 1 W | 0.001 kW |
| 5 W | 0.005 kW |
| 10 W | 0.01 kW |
| 50 W | 0.05 kW |
| 100 W | 0.1 kW |
| 150 W | 0.15 kW |
What is W (W)?
The watt (W) is the SI unit of power: one joule per second. It measures the rate of energy use — a phone charger draws a few watts, an electric kettle around 2,000 W.
What is kW (kW)?
The kilowatt (kW) equals 1,000 watts. It is the legal unit for engine power in the EU and rates appliances, motors and electric-car charging speeds.
Why convert W to kW?
Car engines are rated in kilowatts by EU law, but everyday talk uses horsepower — PS in Europe, hp in the US and UK. Converting between kW, PS and hp is a constant need when comparing cars.
One metric horsepower (PS) is defined as exactly 735.49875 W, so 1 kW = 1.3596 PS. Mechanical horsepower (hp) is 745.7 W, giving 1 kW = 1.341 hp — the two horsepowers differ by about 1.4%.
How to convert W to kW
- Enter the value in W into the left field of the converter.
- Read the result in kW instantly in the right field — it updates automatically.
- Use the swap button to reverse the direction (kW to W).
The converter runs entirely in your browser: no uploads, no queue, no limits. You can even use it offline.