To convert horsepower to kilowatts, what is the approximate conversion factor?

The correct conversion factor for horsepower to kilowatts is approximately 0.7457 kW per hp. This means that one horsepower is equivalent to about 0.7457 kilowatts. This conversion is essential in power engineering as it allows engineers and technicians to translate horsepower ratings into a metric that is more commonly used in many parts of the world, especially in scientific and technical contexts.

Understanding this conversion is particularly important when working with various types of equipment, engines, or motors that may be rated in horsepower. For example, if a motor has a power output of 10 horsepower, using this conversion factor allows one to calculate its power output in kilowatts: 10 hp × 0.7457 kW/hp = 7.457 kW. This is vital for determining energy requirements, efficiency calculations, or compliance with energy regulations in electrical systems.

The other options do not represent widely accepted or accurate conversion factors for horsepower to kilowatts, which can lead to confusion or miscalculations in practical applications. It's crucial in power engineering to use the correct conversion factors to ensure that calculations are accurate and reliable.