# RMS voltage

The root mean square (RMS) voltage is the square root of the mean square.

### Formulas

The RMS voltage can be calculated with one of the following formulas:

We can also calculate the peak voltage, peak-to-peak voltage, and average voltage if we know the RMS voltage:

V _{RMS } is the symbol for RMS voltage and is measured in volt (V).

V _{pk } is the symbol for peak voltage and is measured in volt (V).

V _{pp } is the symbol for peak-to-peak voltage and is measured in volt (V).

V _{avg } is the symbol for average voltage and is measured in volt (V).

### Calculator

You can use the following calculator to calculate the root mean square voltage, peak voltage, peak-to-peak voltage and average voltage. You only have to enter one value.