kVA Calculator

Your details

Choose whether to derive kVA from current and voltage, or from real power and power factor.
Single-phase for residential circuits, three-phase for industrial and commercial loads.
RMS line current drawn by the load.
A
Supply voltage. For three-phase, enter the line-to-line or line-to-neutral voltage depending on the phase selection above.
V
Ratio of real power to apparent power (0.01 to 1.00). Typical motors: 0.7-0.9; resistive loads: 1.0.
Apparent powerFair power factor
4.8kVA

Total power drawn from the supply (real + reactive combined)

Real power3.84kW
Reactive power2.88kVAR
Power factor0.8
Line current20A
Apparent power (VA)4,800VA

4.800 kVA apparent power on a single-phase circuit.

  • Of the 4.800 kVA apparent power, 3.840 kW is real power doing useful work and 2.880 kVAR is reactive power.
  • A power factor of 0.800 (80.0%) is fair. Power factor correction capacitors could reduce reactive losses and lower your kVA demand.
  • At 240 V this load draws 20.00 A from the supply.

Next stepTo reduce kVA and avoid utility demand charges, add correction capacitors sized to bring the power factor above 0.95.

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