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Form Factor and Crest Factor Calculator

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Form Factor and Crest Factor Calculator
V
V
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Please enter all required values.
RESULTS
Form Factor
Crest Factor
RMS / DC Ratio
Peak / RMS Ratio

Input Parameters Specification

RMS VoltageThe effective heating value of an AC waveform used in form factor and crest factor measurement.
DC VoltageThe average or rectified DC value used as the denominator for form factor calculation.
Peak VoltageThe maximum waveform amplitude used for peak-to-RMS crest factor analysis.
Waveform FactorsThese values help compare sine wave, square wave, pulse and rectified electrical signals.

Practical Operational Examples

Sine Wave Check

For a pure sine wave, crest factor is commonly close to 1.414 when peak voltage is divided by RMS voltage.

Rectifier Output Check

Form factor helps compare RMS voltage with average DC voltage in rectifier, charger and power supply testing.

Diagrams & Theory

Form factor and crest factor describe waveform shape. High crest factor means the waveform has a high peak compared with its RMS value.

Vpeak Vrms Vdc / Average Crest Factor = Vpeak / Vrms Form Factor = Vrms / Vdc AC Waveform

Formulas & Mathematical Logic

Step 1: Read RMS Voltage, DC Voltage and Peak Voltage from the input fields.
Step 2: Form Factor = RMS Voltage / DC Voltage.
Step 3: Crest Factor = Peak Voltage / RMS Voltage.
Step 4: The calculator displays both ratios as dimensionless electrical waveform factors.

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About this tool

Form Factor and Crest Factor Calculator is a free online calculator tool. Use it to get instant, accurate results for your electronics calculations.