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