How to convert horsepower to kilowatts
Formula: kW = hp × 0.7457
Worked example: 200 hp → 200 × 0.7457 = 149.14 kW
Multiply horsepower by 0.7457 to get kilowatts. A 300 hp engine delivers about 224 kW, the figure you would find on a European registration document.
Horsepower to kilowatts conversion chart
| Horsepower (hp) | Kilowatts (kW) |
|---|---|
| 1 hp | 0.7457 kW |
| 5 hp | 3.7285 kW |
| 10 hp | 7.457 kW |
| 50 hp | 37.285 kW |
| 75 hp | 55.9275 kW |
| 100 hp | 74.57 kW |
| 150 hp | 111.855 kW |
| 200 hp | 149.14 kW |
| 250 hp | 186.425 kW |
| 300 hp | 223.71 kW |
| 400 hp | 298.28 kW |
| 500 hp | 372.85 kW |
| 600 hp | 447.42 kW |
| 800 hp | 596.56 kW |
| 1,000 hp | 745.7 kW |
What is one horsepower?
Mechanical horsepower, defined as 550 foot-pounds per second, equals about 745.7 watts. It is the unit of US and UK car engines, lawn mowers and boat motors. The word stays the same in the plural.
What is a kilowatt?
The kilowatt equals 1,000 watts. It rates electric heaters, car engines outside the US, solar installations and home electrical service. Running 1 kW for one hour uses 1 kilowatt-hour of energy.