āļø Electric Motor Torque Calculator
Calculate the output torque of an electric motor from its power rating and rotational speed.
1
W
2
RPM
What This Calculates
Torque and rotational speed together determine a motor’s power output. This calculator finds torque when power and speed (RPM) are known ā useful when selecting or sizing an electric motor.
The Formula
T = P / Ļ, where Ļ = 2Ļ Ć RPM / 60 is the angular velocity in radians per second and P is power in watts. Equivalently, T = 9.5488 Ć P / RPM (T in NĀ·m, P in W).
For general educational and planning purposes.
Last reviewed August 2026