metric horsepower
(hk)
Unit of power, approx 735.5 watts.
The metric horsepower (PS, hk, ch) is defined as the power to lift a mass of 75 kg by 1 meter in 1 second. It is approximately 735.5 watts. It differs slightly from the imperial mechanical horsepower.
watt
(W)
SI derived unit of power. 1 joule per second.
The watt (W) is the unit of power in the International System of Units (SI). It is defined as a derived unit of 1 joule per second. It is used to quantify the rate of energy transfer.
horsepower
(hp)
Imperial unit of power, approx 745.7 watts.
Mechanical horsepower (hp), also known as imperial horsepower, is defined as approximately 745.7 watts. It is based on lifting 550 pounds by 1 foot in 1 second.