Motor Torque Calculator

Motor Torque Calculator

Understanding the relationship between power, speed, and twisting force is fundamental to selecting the right motor for any industrial application. The Electra Core Motor Torque Calculator is a high-precision tool designed to help you determine the rotational force (torque) generated by a motor based on its Horsepower (HP) and Revolutions Per Minute (RPM).

Proper torque calculation ensures that your machinery has enough force to start under load and maintain operational speed without overheating or mechanical failure.

Frequently Asked Questions

• What exactly is motor torque?

  Torque is the rotational equivalent of linear force. While Horsepower represents the total work a motor can perform over time, torque represents the actual “turning strength” applied to the shaft. In industrial terms, torque is what gets a heavy load moving, while horsepower keeps it moving.

• How does RPM affect torque?

  There is an inverse relationship between speed and torque for a constant horsepower. If Horsepower remains the same and RPM increases, the available torque decreases. Conversely, if you use a gearbox to reduce the RPM of a motor, the output torque increases significantly.

• When should I choose lb.in vs. N.m?

  lb.in (Pound-inches) is the standard unit used in North American industrial specifications for smaller motors and gearboxes. N.m (Newton-meters) is the SI metric unit used globally. Our tool allows you to toggle between both to match your specific equipment’s data sheet.

• Why does my motor trip the breaker even if the HP is correct?

  This often happens if the “Starting Torque” required by your load exceeds the motor’s capabilities. If a motor cannot generate enough torque to break the static friction of a heavy load, it will draw excessive current (Amps) and trip protective devices. Calculating your required torque helps you avoid undersizing your motor.