A unit of power equal to the work done per second to raise a 75-kilogram object by one meter,Metric horsepower (PS) is defined as a horse pulling a 75-kilogram object 60 meters (60 meters) in one minute, multiplying it to 4,500 KG-M/min (1 metric horsepower) = 735.49875 watts; 1 watt ≈0.00136 metric horsepower