Horsepower = Torque × RPM ÷ 5252
Horsepower = (Force × Distance) ÷ Time ÷ 550
Horsepower = Watts ÷ 746
Horsepower = Kilowatts × 1.341
Horsepower = PSI × CFM ÷ 229
Horsepower = (Torque in lb-ft × RPM) ÷ 5252
Horsepower = (Torque in Nm × RPM) ÷ 7127
Horsepower = (Work in foot-pounds) ÷ (Time in minutes × 33,000)
Horsepower = (Work in joules) ÷ (Time in seconds × 745.7)