Power Factor Correction Calculator
Estimate the reactive power correction required to move a load from an existing power factor to a higher target power factor.
Required correction42.1 kVAR
kVA before125 kVA
kVA after105.3 kVA
Preliminary sizing only. Capacitor application can require harmonic, resonance, switching and overvoltage review.
How this tool works
Required kVAR = kW × [tan(cos⁻¹(PF₁)) − tan(cos⁻¹(PF₂))].
Example
Improving a 100 kW load from 0.80 to 0.95 power factor requires roughly 42 kVAR of capacitive correction.
Common questions
Can I target 1.00 power factor?
Mathematically yes, but practical systems often target below unity to avoid leading power factor under changing load.
Does this check harmonics?
No. Capacitor application can require harmonic and resonance review.