Horsepower to kilowatts – convert hp to kW
Convert horsepower to kilowatts (hp to kW) for car engines, electric motors, generators, pumps and industrial machinery. This page opens the main power converter with hp → kW pre-selected.
Quick reference: hp to kW
For mechanical horsepower, the standard factor is: 1 hp ≈ 0.7457 kW.
| Horsepower (hp) | Kilowatts (kW, approx.) |
|---|---|
| 50 hp | 37.3 kW |
| 75 hp | 56.0 kW |
| 100 hp | 74.6 kW |
| 150 hp | 111.8 kW |
| 200 hp | 149.1 kW |
Why convert horsepower to kilowatts?
- Comparing car power figures between European (kW) and US/UK (hp) sources.
- Checking motor nameplates that mix hp and kW ratings.
- Filling in regulatory or grid-connection forms that require kW.
- Working with engineering calculations that use watts and kilowatts only.
hp vs kW explained
Horsepower (hp) is a traditional unit based on the work an average horse could do, later standardised for engines.
Kilowatts (kW) are the SI unit for power, where 1 kW = 1,000 watts. Most modern engineering documentation prefers kW.
hp to kW FAQ
- Is all horsepower the same?
- No. This converter uses mechanical (imperial) hp. Metric horsepower (PS) is treated separately as its own unit.
- How do I go from hp to watts?
- Convert hp → kW via this page, then multiply kW by 1,000 to get watts – or choose hp and W directly on the homepage.
- What’s a quick head estimate?
- Roughly, 1 hp ≈ 0.75 kW. So 100 hp ≈ 75 kW as a ballpark figure.