How to convert horsepower to kilowatts
One horsepower equals 0.7457 kilowatts. To convert, multiply the number of horsepower by 0.7457 (or divide by 1.341022):
Mental-math shortcut: Multiply horsepower by 0.75 for a quick estimate: 150 hp ≈ 112 kW (exact: 111.85 kW).
Example
Convert 150 horsepower to kilowatts: 150 hp × 0.7457 = 111.85 kW.
Horsepower to Kilowatts conversion chart
| Horsepower (hp) | Kilowatts (kW) |
|---|---|
| 1 | 0.7457 |
| 5 | 3.7285 |
| 10 | 7.457 |
| 25 | 18.6425 |
| 50 | 37.285 |
| 75 | 55.9275 |
| 100 | 74.57 |
| 120 | 89.484 |
| 150 | 111.85 |
| 200 | 149.14 |
| 250 | 186.42 |
| 300 | 223.71 |
| 400 | 298.28 |
| 500 | 372.85 |
| 1,000 | 745.7 |
What is horsepower?
Mechanical (imperial) horsepower (hp) is about 745.7 watts. It is the usual unit for car, motorcycle and boat engines in the US and UK. European spec sheets often use metric horsepower (PS or CV), which is slightly smaller at 735.5 W — so 100 PS is about 98.6 hp.
What is a kilowatt?
A kilowatt (kW) is 1,000 watts. It is the standard unit for engine and electric motor power in most of the world, as well as for heaters, home solar systems and EV chargers. One kilowatt is about 1.341 mechanical horsepower.
Converting the other way? Use the Kilowatts to Horsepower converter.
Frequently asked questions
How many kilowatts is one horsepower?
One horsepower is 0.7457 kilowatts.
How do I convert horsepower to kilowatts?
Multiply the value in horsepower by 0.7457. For example, 150 hp × 0.7457 = 111.85 kW.
What is 100 hp in kilowatts?
100 hp is 74.57 kilowatts.
How do I convert kilowatts to horsepower?
Multiply kilowatts by 1.341022 (or divide by 0.7457). You can also use our Kilowatts to Horsepower converter.
Conversions use the internationally agreed definitions of each unit (for example, 1 inch = 2.54 cm exactly) and are rounded for display. Volume converters use US customary units unless stated otherwise.
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