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) 

To calculate line current, multiply the total phase current by the square root of 3.

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)