Calculate the rotational twisting force produced by a motor given its power and speed.
Operating Conditions
Results
Enter power and rotational speed to determine torque
Overview
Torque is the rotational equivalent of force. In electric motors, it represents the ability to overcome the resistance of a load and start rotation. For a constant power level, torque and RPM are inversely related: high torque occurs at low RPM, and low torque occurs at high RPM.
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Pro Tips
Newton-meters (N·m) is the standard SI unit for torque.
Pound-feet (lb-ft) is commonly used in North America for automotive and industrial ratings.
If you decrease the speed of a motor using a gearbox without losing power, you increase the output torque proportionally.
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Fun Facts
"Electric motors produce their peak torque immediately at 0 RPM, which is why electric vehicles have such impressive off-the-line acceleration."
"The massive electric motors used in container ships can produce millions of Newton-meters of torque."
"Torque is what actually does the 'work' of turning a load; horsepower is just a measurement of how fast that work is being done."
