// multi-utility computation suite · offline · instant · precise
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eng.motor-torque-power Calculator
Calculates motor torque, shaft power, current draw, and thermal loading from motor speed and load characteristics. Motor starting torque must exceed load breakaway torque by at least 20% — high inertia loads require a motor with high pull-up torque throughout acceleration.
Inputs
Power Kw
Rate of energy transfer (W). P = V×I (electrical). P = F×v (mechanical). 1 horsepower ≈ 746 W.
Rpm
Rate of movement. 1 m/s = 3.6 km/h = 2.237 mph.
Efficiency Pct
Useful output divided by total input, as a percentage. 100% is impossible due to losses (heat, friction, resistance).
Results
shaft torque (N·m)
Rotational force (N·m) = force × perpendicular lever arm. High torque at low RPM is ideal for hauling; high RPM suits high-speed applications.
angular velocity (rad/s)
Sample size or count used in the calculation.
power (HP)
Reference formula or conversion factor shown for context.
input power (kW)
Sample size or count used in the calculation.
T = P / ω
Reference formula or conversion factor shown for context.