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Tyres > Help > Tyres Help > Convert HP to kW
Horsepower (HP) is a unit of measurement for power, the rate at which work is done. Originally devised by engineer James Watt to compare the power of steam engines with the work of draft horses, it has since become a standard unit for measuring the power output of engines, motors, and other machinery. One horsepower is defined as the ability to move 550 pounds one foot in one second, or 33,000 foot-pounds per minute.
To find the conversion from HP to kW, multiply the HP value by 0.7457. This conversion factor arises from the definition of a horsepower: 1 HP equals 745.7 watts, and since 1 kilowatt equals 1,000 watts, the conversion factor from HP to kW is 0.7457.
There are approximately 0.7457 kilowatts in 1 horsepower.
The formula for the conversion from HP to kW is: Kilowatts = Horsepower x 0.7457
For example, if an engine produces 100 HP, the equivalent power in kilowatts would be: Kilowatts = 100 x 0.7457 = 74.57 kW
Here is a table of conversions from horsepower to kilowatts for common power levels:
| Horsepower (HP) | Kilowatts (kW) |
| 0.5 | 0.37285 |
| 1 | 0.7457 |
| 1.5 | 1.11855 |
| 2 | 1.4914 |
| 3 | 2.2371 |
| 4 | 2.9828 |
| 5 | 3.7285 |
| 6 | 4.4742 |
| 7 | 5.2199 |
| 7.5 | 5.59275 |
| 8 | 5.9656 |
| 9 | 6.7113 |
| 10 | 7.457 |
| 20 | 14.914 |
| 30 | 22.371 |
| 40 | 29.828 |
| 50 | 37.285 |
| 60 | 44.742 |
| 70 | 52.199 |
| 80 | 59.656 |
| 90 | 67.113 |
| 100 | 74.57 |
| 150 | 111.855 |
| 200 | 149.14 |
| 250 | 186.425 |
| 300 | 223.71 |
| 350 | 260.995 |
| 400 | 298.28 |
| 450 | 335.565 |
| 500 | 372.85 |