HP that briefly with the hp shown. be that the amount of work done per unit of time to express. The term in the late eighteenth century by Scottish inventor, etc., James Watt to compare the efficiency of the steam engine with a horse power of work adopted. After that to measure the efficiency reciprocating engines and electric turbines, its application is more expanded, but nowadays this term because the definition there is of it available. in science, so not going to work. Horsepower as a measure of the power engines within the burner more in the automotive industry is a term common. Unit be installed on the machine SI Watt. A horse out of steam, according to the definitions., 735٫5 up to 750 watts. In the sources and calculations electrical engineering, a horsepower equal to 746 Watts. Image horsepower, metric (HP). A horsepower the power required to lift a weight of 75 kg (average weight of a person) to one meter (3.28 feet) in width A seconds. The horsepower metric equivalent approximate 735.5 Watts.