Horsepower (hp) to Kilowatts (kW) Conversion
Horsepower
Horsepower (hp) is a unit of power originally defined by James Watt in the 1780s to market steam engines against the work output of draft horses. The US mechanical horsepower equals exactly 745.69987158 watts. Multiple definitions exist: mechanical hp (745.7 W), metric hp (735.5 W), and electrical hp (746 W). In the automotive industry, engine power is expressed in horsepower in the US and UK markets, where 1 hp ≈ 0.7457 kW.
Kilowatts
The kilowatt (kW) is a unit of power equal to exactly 1,000 watts and is the practical unit for household appliances, vehicle engines, and small industrial machinery. Electric kettles typically consume 2–3 kW; domestic air conditioners run at 1–5 kW; EV charging stations provide 7–22 kW for home use. Engine power in electric vehicles is specified in kilowatts globally, replacing the horsepower in official EU vehicle type approval documentation.
| Horsepower (hp) | Kilowatts (kW) |
|---|---|
| 0.1 hp | 0.0746 kW |
| 1 hp | 0.7457 kW |
| 2 hp | 1.4914 kW |
| 3 hp | 2.2371 kW |
| 5 hp | 3.7285 kW |
| 10 hp | 7.457 kW |
| 20 hp | 14.914 kW |
| 30 hp | 22.371 kW |
| 50 hp | 37.285 kW |
| 100 hp | 74.57 kW |
| 1000 hp | 745.6999 kW |
Frequently Asked Questions (FAQ)
How many kilowatts are in 1 horsepower?
1 horsepower (hp) is exactly 0.7457 kilowatts (kW).
How do I convert horsepower to kilowatts?
Multiply the value in horsepower by 0.7457 to get the result in kilowatts. Or use the converter above — type any number and see the result instantly.