How to Calculate RMS Voltage
The root-mean-square (RMS) voltage can be calculated either from the peak voltage, the peak-to-peak voltage, or the average voltage.
The formulas to calculate the RMS voltage from either of these voltages are shown below:
How to Calculate RMS Voltage from Peak Voltage
If you are given the peak voltage value, you can calculate the RMS voltage using the above formula.
All you have to do to obtain the RMS value is to multiply the peak voltage by 0.7071.
How to Calculate the RMS Voltage from Peak-to-Peak Voltage
If you are given the peak-to-peak voltage value, you can calculate the RMS voltage using the above formula.
All you must do to obtain the RMS value is to multiply the peak-to-peak voltage by 0.35355.
How to Calculate the RMS Voltage from Average Voltage
If you are given the average voltage value, you can calculate the RMS voltage using the above formula.
All you must do to obtain the RMS value is to multiply the average voltage by 1.1107.
To use our online calculator to compute RMS voltage, see
Voltage RMS Calculator.
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