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.

Full steps per revolution

Full steps per revolution, 200 for a 1.8 degree motor.

Microstepping

Microstepping divisor between 1 and 256.

Compute the resolved step count per revolution of a stepper motor from its full steps per revolution and the microstepping divisor, which defaults to 200 full steps and no microstepping. 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]

Steps per revolution

Microsteps per revolution after dividing.

• Pulse width, angle, speed, and step relationships depend on controller convention, gearing, microstepping, load, supply, deadband, mechanical stops, acceleration, missed steps, and calibration. Commanded position is not necessarily achieved position.
• 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.

• Stepper Motor Pulse Frequency From Rpm

  Convert stepper motor shaft speed to pulse frequency from full or microsteps per revolution; the step count must include the chosen microstepping mode.

• Stepper RPM From Pulses

  Compute stepper motor speed in revolutions per minute from a step pulse rate in hertz and the step count per revolution using rpm = pulses * 60 / steps.

• Motor Back EMF

  Compute the back EMF of a brushless motor in volts as shaft speed divided by its Kv constant in rpm per volt.