Horsepower (hp) is the name of unit of measurement of power, 1 hp = 746 watts.
Rotating Horsepower(HP) = T * (N / 5252) Watt
Where, N - Speed, T - Torque.
For example, when Torque is 10504 Pound-foot, Speed is 3 revolution per minute, tehn Rotating HP is 6 Watt.