How many kilowatts are in 1 hp?

1 hp = 0.7457 kW. Conversely: 1 kW = 1.341022 hp.

How do I convert horsepower to kilowatts?

Use the formula: kW = hp × 0.74569987. For example, 10 hp = 7.457 kW. Or simply type a value into the calculator above.

Is the calculator accurate?

Yes. It uses exact international conversion factors and rounds the result to 6 decimal places.

Horsepower to Kilowatts (hp to kW)

A fast horsepower-to-kilowatts calculator – the result updates as you type.

Horsepower (hp)

Kilowatts (kW)

Swap units

1 hp = 0.7457 kW

1 hp = 0.7457 kW. Enter a value and get the result instantly. Below you will find the formula and a table of commonly used values.

Formula

kW = hp × 0.74569987

hp to kW table

hp	kW
1 hp	0.7457 kW
2 hp	1.4914 kW
5 hp	3.7285 kW
10 hp	7.457 kW
20 hp	14.914 kW
50 hp	37.285 kW
100 hp	74.57 kW
500 hp	372.8499 kW
1,000 hp	745.6999 kW

Where it is used

Horsepower is converted to kilowatts when registering or insuring a car in Lithuania, because technical documents give power in kW. It is also useful for comparing electric and petrol cars.

A quick mental shortcut

1 hp = 0.7457 kW (mechanical horsepower). Roughly, multiply by 3/4: 100 hp x 0.75 = 75 kW (the exact result is 74.57).

Exact examples: 150 hp x 0.7457 = 111.86 kW; 300 hp = 223.71 kW.

Good to know

James Watt introduced horsepower in the late 18th century to compare steam engines with the pulling power of horses. The watt itself is named after him.