RMS Voltage Calculator

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Calculates the Root Mean Square (RMS) value of an AC voltage, representing its effective DC equivalent.

How To Use

How to use this calculator

Start with your values, or try a preset.

Step 1

Enter Peak Voltage (V) and Form Factor in the units shown.

Step 2

Read RMS Voltage (V) and Average Absolute Voltage (V) in the results panel. Results update as you change the inputs.

Step 3

Choose a preset to load an example, then adjust the values for your situation.

Worked Examples

See the inputs and their calculated results.

Peak Voltage (V): 170 V; Form Factor: 1.11 V

RMS Voltage (V): 120.2081528 V; Average Absolute Voltage (V): 108.2956332 V

Peak Voltage (V): 325 V; Form Factor: 1.11 V

RMS Voltage (V): 229.8097039 V; Average Absolute Voltage (V): 207.0357693 V

Peak Voltage (V): 100 V; Form Factor: 1.11 V

RMS Voltage (V): 70.71067812 V; Average Absolute Voltage (V): 63.70331362 V

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