HP to KW converter

How to convert horsepower to kilowatts

To convert horsepower to kilowatts, use kW = hp × 0.7457. For example, 150 hp is 111.855 kW. Type any value in the converter above and the result updates instantly.

The HP to KW formula

The conversion is kW = hp × 0.7457. One horsepower equals 0.7457 kW. This conversion is exact: horsepower is defined precisely in terms of kilowatt, so the only rounding is in the digits shown.

HP to KW conversion table

Where horsepower and kilowatts are used

Horsepower is the traditional rating of engines and motors, especially in the United States and the United Kingdom.

Kilowatts are the SI unit of power: engines, motors, appliances and solar panels.

Worked examples

These examples use the formula above, so you can check the converter or do the same by hand:

• 5 hp = 3.7285 kW
• 50 hp = 37.285 kW
• 100 hp = 74.57 kW

Converting horsepower to kilowatts in your head

Multiply by 0.75: 100 hp is about 75 kW (exactly 74.57 kW).

KW to HP reference table

For the opposite direction, these values are handy to have at hand:

Common mistakes to avoid

• Mechanical horsepower (745.7 W) and metric horsepower (735.5 W) differ slightly; this converter uses the mechanical horsepower.
• Engine power and electric power ratings are measured under different conditions.

About this converter

The converter accepts whole numbers, decimals and negative values, gives the result as you type, and uses full precision internally, so what you copy is as accurate as it can be. It runs in your browser: nothing you type is sent to a server, it keeps working offline once the page has loaded, and there is nothing to install.

Need the opposite direction? Use the KW to HP converter.