I have 12v dc motor with 13amp current and 150 watts. Need to find the torque and rmp of the motor

You need RPM to find Torque.

Quote:

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Originally Posted by ma0641

You need RPM to find Torque.

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Right:

T = P/(RPM x 2 pi x 60 s/min)

where T = torque in N-m and P = power in watts. You know max power = 150 watts, now just find out the RPM (which should be written on a label on the motor) and you can determine the motor's torque.