Sorry,
P=τ * ω where, τ: torque, measured in Newton-meters (N•m)
1N•m= 0.738 ft-lbs
I want to edit my previous answer but can't find the edit option. Thank you for pointing it out.
Mechanical power output of the motor could be calculated by using the following formula:
Pmech = Pout = τ * ω
where
Pout: output power, measured in watts (W);
τ: torque, measured in Newton-meters (N•m) or foot-pounds (ft/lbs);
ω: angular speed, measured in radians per second (rad/s).
