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.

Duty cycle (%)

Required number input.

Period (ms)

Required number input.

Compute the pulse width as duty percent x period / 100 for duty between zero and one hundred inclusive. 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]

Pulse width (ms)

The resulting pulse width returned as a number.

• PWM averages assume a defined waveform, period, amplitude, load response, and switching convention. Resolution, timer clock, dead time, minimum pulse width, quantization, filtering, and nonlinear loads affect the realized output.
• 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.

• Duty From Pulse Width

  Compute the duty cycle percent as pulse width / period x 100.

• Boost Duty Cycle

  Compute the ideal boost converter duty cycle percent as (1 - Vin/Vout) x 100.

• Buck-Boost Duty

  Compute the inverting buck-boost duty cycle percent as |Vout| / (Vin + |Vout|) x 100.