Can target power factor be lower than initial?
For correction sizing here, target PF must be greater than the initial PF and no more than 1.
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Power Factor Correction Calculator — Required Capacitor kVAR
Calculate ideal capacitor reactive power needed to move a real-power load from an initial to a target displacement power factor.
Result
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Formula and worked example
Qc(kVAR)=P(kW)×[tan(acos(PF1))−tan(acos(PF2))].
100 kW from PF 0.80 to 0.95 requires about 42.13 kVAR in the ideal sinusoidal displacement-PF model.
Assumptions
- Uses displacement power factor and a simplified sinusoidal power triangle.
- Harmonics, resonance, switching steps and utility rules require engineering review.
Last updated: 2026-09-16
Frequently asked questions
Is calculated kVAR a final capacitor-bank specification?
No. It is an ideal reactive-power target, not a complete bank design.