ClueLuma

Power triangle calculator

Use perpendicular real and reactive components to obtain apparent power in a sinusoidal model.

S=PkW2+Q2S = \sqrt{P_{\text{kW}}^{2} + Q^{2}}

Calculator

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

kW
kVAR
kVA

Worked example

Given

  • PkWP_{\text{kW}} = 270 kW
  • QQ = 360 kVAR
S=2702+3602=450S = \sqrt{{270}^{2} + {360}^{2}} = 450

Symbols and units

SymbolMeaningUnit
SSapparent powerkVA
PkWP_{\text{kW}}real powerkW
QQreactive powerkVAR

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.