basic

Three-Phase Apparent Power (kVA) Calculator

S = √3·VL·IL — three-phase apparent power.

Calculates apparent power (kVA), active power (kW), and reactive power (kVAR) for a three-phase AC system from line voltage, line current, and power factor.

Nadia Almasri By Nadia Almasri
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
Was this helpful?

How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

S = √3 × VL × IL / 1000 (kVA); P = S × pf; Q = S × √(1−pf²)

In depth

Calculates apparent power (kVA), active power (kW), and reactive power (kVAR) for a three-phase AC system from line voltage, line current, and power factor.