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Motor Rating Torque Calculator

Free calculator estimate AC motor rating torque in Imperial and SI unit.

Motor Rating
Speed
RPM
Frequency
Hz

Motor Rating Torque
Motor Poles

Motor Torque

The rating torque of a motor is the torque necessary to produce its rated power (in HP or kW) at rating speed.
In pounds at a foot radius, it is equal to the horsepower times 5252 divided by the rating speed.

In SI unit:

where:

  • T : Motor torque in lbft or Nm
  • P : Motor real power in HP or kW
  • n : Motor speed in RPM