Three phase Power Calculator

Three phase Power Calculator


Three Phase Power
Power Factor


Three Phase Power refers to three wire Alternating Current (AC) power circuits. Three-phase electric power is a common method of alternating-current electric power generation and distribution. Typically there are three (Phase A, Phase B, Phase C) power wires (120 degrees out of phase with one another) and one neutral wire.

Let’s consider a 3 Phase 4 Wire 208Y/120V power circuit. This arrangement provides (3) 120V single phase power circuits and (1) 208V three phase power circuit. 120V power flows (alternating) between any power wire (through the load) and the neutral wire. 208V power flows (alternating) between the three power wires (through the load).

Three phases are used when you need a lot of power, or to run synchronous motors or power large motors and other heavy loads. Three Phase power arrangement saves on electrical construction costs by reducing the current requirements, the required wire size, and the size of associated electrical devices. It also reduces energy costs because the lower current reduces the amount of electrical energy lost to resistance


Formula used for Three Phase Power calculation is:

Three Phase Power(w) = Voltage(v)[V]  *  Current(A)[I]  *  1.732  *  Power Factor[PF]


Calculate the three phase power of a circuit when a battery of 10 V is applied and a current of 5A is flowing through it. Take Power factor = 0.8?

Sol. :

Three Phase Power = V  *  I  *  1.732  *  PF

Three Phase Power(w) = 10(v)  *  5(A)  *  1.732  *  0.8

Three Phase Power = 69.28 W

Three Phase Power is 69.28 Watts


The standard unit of measurement for Three Phase Power is Watt i.e. (W)

Below is the conversion chart of various other units of Power