Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Torque (N·m)

Shaft torque.

Angular speed (rad/s)

Angular speed of the shaft.

Compute mechanical output power in watts from torque in newton meters times angular speed in radians per second. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Mechanical power (W)

Mechanical power delivered at the shaft.

• Motor constants, current, torque, speed, reactive power, and propeller thrust depend on winding temperature, controller, supply sag, losses, saturation, load curve, airflow, and operating point. Nameplate constants and ideal propeller laws need test data for final sizing.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• Brushless Motor Kv To Kt

  Convert a brushless motor speed constant in RPM per volt to ideal torque constant in newton-meters per ampere using 60/(2πKv); winding and measurement conventions must match.

• Motor Efficiency %

  Compute motor efficiency percent as mechanical output power over electrical input power times one hundred.

• Torque Constant Kt

  Compute the torque constant Kt in newton meters per ampere from the motor velocity constant Kv using Kt = 60 / (2 * pi * Kv).