ClueLuma

Power factor (PF) calculator

Real power divided by apparent power measures how much supply capacity produces useful power.

PF=PkWS\mathrm{PF} = \frac{P_{\text{kW}}}{S}

Calculator

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

kW
kVA
decimal

Worked example

Given

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

Symbols and units

SymbolMeaningUnit
PF\mathrm{PF}power factordecimal
PkWP_{\text{kW}}real powerkW
SSapparent 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.