Power Factor Calculator — Free Online Calculator
Calculate power factor from real and apparent power. Find the capacitor size needed for power factor correction.
How to Use This Calculator
Enter real power (kW) from your meter and apparent power (kVA) from the nameplate or utility bill. Set your target power factor (0.95 is typical).
The Formula Explained
Power Factor = Real Power / Apparent Power = kW / kVA. Reactive power Q = P × tan(arccos(PF)). Capacitor kVAR needed = Q_current - Q_target.