Enter the total phase current (amps) into the calculator to determine the Line Current. 

Line Current Formula

The following formula is used to calculate the Line Current. 

IL = IP * SQRT(3)

  • Where IL is the Line Current (amps)
  • IP is the total phase current (amps) 

How to Calculate Line Current?

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

Example Problem #1:

  1. First, determine the total phase current (amps). In this example, the total phase current (amps) is measured to be 56.
  2. Finally, calculate the Line Current using the formula above: 

IL = IP * SQRT(3)

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

IL = 56 * SQRT(3) = 96.99 (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:

total phase current (amps) = 82

Entering these values into the formula above gives : 

IL = 82 * SQRT(3) = 142.028 (amps)