This calculator allows you to convert from Horsepower (550 ft*lbf/s) to Pound-foot/second and in a reverse direction. To convert from Horsepower (550 ft*lbf/s) to Pound-foot/second, enter the amount of Horsepower (550 ft*lbf/s) into the first input and to convert from Pound-foot/second to Horsepower (550 ft*lbf/s), enter the amount of Pound-foot/second into the second input.