ClueLuma

Power factor (PF) calculator

Real power divided by apparent power gives total power factor; the phase-angle equality assumes sinusoidal waveforms.

PF=kWkVA\mathrm{PF} = \frac{\mathrm{kW}}{\mathrm{kVA}}

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

kW
kVA
ratio

Worked example

Given

  • kW\mathrm{kW} = 320 kW
  • kVA\mathrm{kVA} = 400 kVA
PF=320400=0.8\mathrm{PF} = \frac{320}{400} = 0.8

Symbols and units

SymbolMeaningUnit
PF\mathrm{PF}power factorratio
kW\mathrm{kW}real powerkW
kVA\mathrm{kVA}apparent powerkVA

Related calculators

Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.