Power Factor Calculator

Calculate power factor, reactive power (kVAR), phase angle, and capacitor bank size needed for power factor correction in three-phase AC systems.

⚙️ Input Parameters

Real Power (kW)

Apparent Power (kVA)

Target Power Factor (for correction)

System Frequency (Hz)

PF = kW / kVA = cos(φ)

kVAR = √(kVA² − kW²)

Q_c = P × (tan φ₁ − tan φ₂)

Assumes sinusoidal (non-distorted) supply waveform — displacement PF only
Does not account for harmonic distortion (true PF ≠ displacement PF in non-linear loads)
Capacitor sizing is approximate — actual bank selection depends on available standard kVAR steps
Assumes balanced three-phase load
Target PF above 0.99 may cause leading power factor during light load — not recommended