Enter the voltage (amps), the current (amps), and the power factor into the calculator to determine the Three Phase Power. 

Three Phase Power Formula

The following formula is used to calculate the Three Phase Power.

P = V*I*PF*SQRT(3)
  • Where P is the Three Phase Power (watts)
  • V is the voltage (amps) 
  • I is the current (amps) 
  • PF is the power factor 

To calculate the three phase power, multiply the voltage by the current and power factor, then multiply gain by the square root of 3.

How to Calculate Three Phase Power?

The following example problems outline how to calculate Three Phase Power.

Example Problem #1

  1. First, determine the voltage (amps). In this example, the voltage (amps) is determined to be 23 .
  2. Next, determine the current (amps). For this problem, the current (amps) is measured to be 20 .
  3. Next, determine the power factor. In this case, the power factor is found to be 15.
  4. Finally, calculate the Three Phase Power using the formula above: 

P = V*I*PF*SQRT(3)

Inserting the values from above and solving yields: 

P = 23*20*15*SQRT(3) = 11,951.15 (watts)

Example Problem #2

Using the same method as above, determine the variables required by the formula. For this example problem, these are:

voltage (amps) = 10

current (amps) = 4

power factor = 8

Enter these given values into the calculator or above yields: 

P = 10*4*8*SQRT(3) = 554.25 (watts)