Answer / abdul hameed

there is no relationship between speed and hp but we can calculate the hp from the current for each phase

Answer / shaju

As we know,
we can calcualte torque by equation,

Torque=(1800/RPM)*HP*3
From this we can calculate HP from Speed.
i.e HP=(Torque*RPM)/(1800*3)
or HP=(Torque*RPM)/(5400)

Answer / bhatt

Power = 2 * pi * Speed *Torque/4500 Watt
Power in HP = Power in watt/746

Answer / u.v.v.satyanarayana

if we want to calculate the h.p of motor, it is neccesary
to find the anglervelocity(w) and torue.

Answer / raghu

If you want to know the HP of the motor you should have name plate

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