HP to kW Converter
Useful for comparing car and motorcycle engine ratings. This page uses mechanical horsepower (hp), common in the US and the UK.
1 hp = 0.7457 kW
kilowatts
1 hp = 0.7457 kW
How to convert mechanical horsepower to kilowatts
Multiply the number of mechanical horsepower by 0.74569987.
Formula
kW = hp × 0.74569987
The factor is rounded; the converter uses the full-precision value.
Examples
- 100 hp × 0.74569987 = 74.57 kW
- 150 hp × 0.74569987 = 111.855 kW
- 400 hp × 0.74569987 = 298.2799 kW
Mechanical horsepower to kilowatts conversion table
| Mechanical 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 |
| 125 | 93.2125 |
| 150 | 111.855 |
| 200 | 149.14 |
| 250 | 186.425 |
| 300 | 223.71 |
| 400 | 298.2799 |
| 500 | 372.8499 |
| 700 | 521.9899 |
| 1,000 | 745.6999 |
Values rounded to 4 decimal places or 4 significant digits.
About mechanical horsepower
Mechanical horsepower, also called imperial horsepower, is defined as 550 foot-pounds-force per second, about 745.7 watts. US and UK car engine ratings in "hp" or "bhp" use this definition.
About kilowatts
A kilowatt is 1,000 watts. Engine power in Europe, heat pumps, solar panels and EV chargers are rated in kilowatts.
Frequently asked questions
How many kilowatts are in one mechanical horsepower?
One mechanical horsepower equals 0.7457 kilowatts (rounded).
How do I convert mechanical horsepower to kilowatts?
Multiply the number of mechanical horsepower by 0.74569987. For example: 150 hp × 0.74569987 = 111.855 kW.
How many mechanical horsepower are in one kilowatt?
One kilowatt equals 1.341 mechanical horsepower.
Is the hp to kW conversion exact?
The factor between these units has more decimals than are useful to show, so it is rounded on this page. The converter itself always calculates with the full-precision value.