Enter the volt-amps (VA) and the total voltage (volts) into the calculator to determine the 3 Phase Current. 

3 Phase Current Formula

The following formula is used to calculate the 3 Phase Current. 

I3 = VA/ V

  • Where I3 is the 3 Phase Current (amps)
  • VA is the volt-amps (VA) 
  • V is the total voltage (volts) 

How to Calculate 3 Phase Current?

The following two example problems outline how to calculate the 3 Phase Current.

Example Problem #1:

  1. First, determine the volt-amps (VA). In this example, the volt-amps (VA) is measured to be 45.
  2. Next, determine the total voltage (volts). For this problem, the total voltage (volts) is calculated to be 5.
  3. Finally, calculate the 3 Phase Current using the formula above: 

I3 = VA/ V

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

I3 = 45/ 5 = 9 (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:

volt-amps (VA) = 75

total voltage (volts) = 6

Entering these values into the formula above gives : 

I3 = 75/ 6 = 12.5 (amps)