ClueLuma

Balanced three-phase apparent power calculator

Apparent power is calculated as sqrt(3) × V_LL × I/1000. Use the stated system boundary and matching input units.

S=3×VLL×I1000S = \frac{\sqrt{3} \times V_{\text{LL}} \times I}{1000}

Calculator

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V
A
kVA

Worked example

Given

  • VLLV_{\text{LL}} = 480 V
  • II = 300 A
S=3×480×3001000≈249.4S = \frac{\sqrt{3} \times 480 \times 300}{1000} \approx 249.4

Symbols and units

SymbolMeaningUnit
SSapparent powerkVA
VLLV_{\text{LL}}line voltageV
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.