Calculator
Reactive Compensation Estimate
Change the inputs to match your equipment. Results update automatically.
Formula
Qc = P(kW) x (tan phi1 - tan phi2) Worked example
For 100 kW, improving power factor from 0.80 to 0.95 gives Qc = 100 × (tan(arccos 0.80) − tan(arccos 0.95)) ≈ 42.13 kVAr.
Scope and interpretation
Check harmonics, resonance, switching steps and the actual load profile before capacitor selection.