Enter the average voltage or RMS voltage into the peak voltage calculator. The calculator will display the total peak voltage.

Peak Voltage Formula

The following formulas are used to calculate peak voltage from average or RMS voltage.

Vp = Vrms * Sqrt(2)
  • Where Vp is the peak voltage
  • Vrms is the RMS (root-mean-square) voltage
Vp  = Vave * Pi/2
  • Where Vp is the peak voltage
  • Vave is the average voltage

To calculate the peak voltage, multiply the the root-mean-square voltage by the square root of 2.

Peak Voltage Definition

A peak voltage is the maximum value of the voltage of a sinusoidal voltage wave.

How to calculate peak voltage?

How to calculate peak voltage

  1. First, determine which voltage value you will use

    Voltage is typically measured as a sinusoidal function. As a result, the voltage varies over time. To measure the average of this variation, either the average voltage or the RMS (root-mean-square) voltage.

  2. Choose the correct formula

    Next, depending on your voltage measurement in step 1, chose the formula needed to calculate peak voltage.

  3. Calculate Peak Voltage

    Calculate the peak voltage using the equation or calculator above.


What is peak voltage?

Since voltage is not constant, but rather varies along with a sinusoidal wave, typically the average voltage is measured. However, this voltage will have peaks and valleys as it travels along that wave. Therefore, the peak voltage is the max voltage a voltage wave sees.

What is RMS?

RMS stands for root-mean-square and is exactly as it sounds. It’s the root of the square-mean. It’s very similar to the average of a set of data.