Enter the root mean square (RMS) current (amps) into the calculator to determine the Peak Current. 

Peak Current Formula

The following formula is used to calculate the Peak Current. 

Ip = Irms * SQRT(2)

  • Where Ip is the Peak Current (amps)
  • Irms is the root mean square (rms) current (amps) 

How to Calculate Peak Current?

The following two example problems outline how to calculate the Peak Current.

Example Problem #1:

  1. First, determine the root mean square (rms) current (amps). In this example, the root mean square (rms) current (amps) is measured to be 50.
  2. Finally, calculate the Peak Current using the formula above: 

Ip = Irms * SQRT(2)

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

Ip = 50 * SQRT(2) = 70.71 (amps)


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:

root mean square (rms) current (amps) = 30

Entering these values into the formula above gives : 

Ip = 30 * SQRT(2) = 42.426 (amps)