ClueLuma

3-phase real power calculator

Use line voltage, line current and PF to calculate three-phase input.

Pinput=3×VLL×I×PF1000P_{\text{input}} = \frac{\sqrt{3} \times V_{\text{LL}} \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
kW

Worked example

Given

  • VLLV_{\text{LL}} = 100 V
  • PF\mathrm{PF} = 0.85 —
  • II = 0.85 A
Pinput=3×100×0.85×0.851000≈0.1251P_{\text{input}} = \frac{\sqrt{3} \times 100 \times 0.85 \times 0.85}{1000} \approx 0.1251

Symbols and units

SymbolMeaningUnit
PinputP_{\text{input}}3-phase input powerkW
VLLV_{\text{LL}}line-to-line voltageV
PF\mathrm{PF}power factor—
IIline currentA

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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.