Electric Motor Torque Calculator

Find motor torque from power and speed.

Torque (N·m) 31.83

Formula: T = 9549 × kW ÷ rpm

Step-by-step with your numbers:

1. Values used:

2. Power = 5 kW

3. Speed = 1,500 rpm

5. Torque = 31.83N·m

Did we solve your problem today?

An electric motor's torque relates to its power output and rotational speed.

The math behind it

T(N·m) = 9549 × power(kW) ÷ speed(rpm). The constant folds in the 60/(2π) conversion.

5 kW at 1500 rpm → about 31.8 N·m.

Why more torque at low rpm?

For the same power, torque rises as speed falls (T = P/ω).