ClueLuma

Single-phase measured real power calculator

Use rms voltage, rms current and total PF for single-phase real power; current alone is insufficient.

P=V×I×PF1000P = \frac{V \times I \times \mathrm{PF}}{1000}

Calculator

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

V
A
ratio
kW

Worked example

Given

  • VV = 240 V
  • II = 18 A
  • PF\mathrm{PF} = 0.8 ratio
P=240×18×0.81000=3.456P = \frac{240 \times 18 \times 0.8}{1000} = 3.456

Symbols and units

SymbolMeaningUnit
PPsingle-phase real powerkW
VVrms voltageV
IIrms currentA
PF\mathrm{PF}total power factorratio

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