Enter the peak voltage (volts) into the calculator to determine the Effective Voltage. 

Effective Voltage Formula

The following formula is used to calculate the Effective Voltage. 

Veff = Vp / SQRT(2)


  • Where Veff is the Effective Voltage (volts)
  • Vp is the peak voltage (volts) 

How to Calculate Effective Voltage?

The following two example problems outline how to calculate the Effective Voltage.

Example Problem #1:

  1. First, determine the peak voltage (volts). In this example, the peak voltage (volts) is measured to be 37.
  2. Finally, calculate the Effective Voltage using the formula above: 

Veff = Vp / SQRT(2)

Inserting the values from above and solving the equation with the imputed values gives: 

Veff = 37 / SQRT(2) = 26.162 (volts)

Example Problem #2: 

Using the same process as example problem 1, we first define the variables outlined by the formula. In this case, the values are:

peak voltage (volts) = 1000

Entering these values into the formula or calculator above gives us:: 

Veff = 1000 / SQRT(2) = 707.106 (volts)