Physics

Electric Motor Torque Calculator

Find motor torque from power and speed.

Calculated Output

Torque (N·m) 31.83

Formula: T = 9549 × kW ÷ rpm

Step-by-Step Breakdown

1. Values used:

2. Power = 5 kW

3. Speed = 1,500 rpm

5. Torque = 31.83N·m

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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).