Horsepower to Kilowatts Converter hp → kW
1 horsepower (mechanical) (hp) = 0.7456998716 kilowatts (kW). Type a value below — the conversion happens instantly, entirely on your device.
1 hp = 0.7456998716 kW
300 horsepower = 223.70996 kilowatts
300 × 0.7457 = 223.70996
1 hp equals 0.7457 kW, so multiplying by 0.7457 converts the value. The result describes the exact same quantity — only the measuring stick changes.
How to convert horsepower to kilowatts
kilowatts = horsepower × 0.7456998716 — multiply the horsepower (mechanical) value by 0.7457.
Example: 300 hp = 223.71 kW.
To convert the other way: horsepower = kilowatts ÷ 0.7456998716 — or use the dedicated kW to hp converter .
Horsepower-to-kilowatts is the standard engine-spec conversion — EV motors and official EU figures use kW while US car culture uses hp. A 300 hp engine is 223.7 kW. Quick estimate: multiply hp by 0.75.
Horsepower to Kilowatts conversion table
| Horsepower (hp) | Kilowatts (kW) |
|---|---|
| 50 | 37.284994 |
| 75 | 55.92749 |
| 100 | 74.569987 |
| 150 | 111.85498 |
| 200 | 149.13997 |
| 250 | 186.42497 |
| 300 | 223.70996 |
| 400 | 298.27995 |
| 500 | 372.84994 |
| 750 | 559.2749 |
| 1000 | 745.69987 |
About the units
What is a horsepower (mechanical)?
Mechanical horsepower (hp) is exactly 745.6998715823 watts — 550 foot-pounds per second, defined by James Watt. US and UK car engines are rated in this horsepower.
What is a kilowatt?
A kilowatt (kW) is 1,000 watts. Electric vehicle motors, home appliances and solar systems are rated in kilowatts; 1 kW ≈ 1.34 hp.
Frequently asked questions
How many kilowatts are in 1 horsepower (mechanical)?
1 horsepower (mechanical) (hp) = 0.7456998716 kilowatts (kW).
What is the formula to convert horsepower to kilowatts?
kilowatts = horsepower × 0.7456998716 — multiply the horsepower (mechanical) value by 0.7457.
How do I convert hp to kW without a calculator?
Multiply by 0.746 for a close estimate. Exact factor: 1 hp = 0.7456998716 kW.
Is this hp-to-kW converter accurate and private?
Yes. It uses the exact internationally defined conversion factors and computes results locally in your browser — your input is never sent to a server, and the page keeps working offline.
Is hp or PS bigger?
Mechanical hp (745.7 W) is about 1.4% larger than metric PS (735.5 W). A 300 PS engine is 296 hp — marketing materials sometimes blur the two.