basic

Motor Torque from Power and RPM Calculator

T = P × 9549 / RPM (Nm); P in kW.

Calculates motor shaft torque from power and rotational speed. Also outputs angular velocity ω in rad/s. Essential for motor sizing and drivetrain design.

Dr. Helena Ortiz By Dr. Helena Ortiz
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

ω = 2π × RPM / 60; T = P_W / ω = P_kW × 9549.3 / RPM (Nm)

In depth

Calculates motor shaft torque from power and rotational speed. Also outputs angular velocity ω in rad/s. Essential for motor sizing and drivetrain design.