Power Factor Correction Calculator
Capacitor size needed to improve power factor.
kW
How it works
Capacitor kVAR = kW × (tan φ₁ − tan φ₂), where φ = arccos(power factor). Raising power factor lowers current and apparent power for the same real load, which can cut utility penalties and cable losses. Power factors must be between 0 and 1. Example: with the default values, capacitor size needed comes to 55.3 kVAR.
FAQ
Is this calculator free?
Yes. No signup is needed and nothing you enter is stored.
Is the result exact?
Results are rounded for display. For financial, medical, or legal decisions, confirm with a professional.
Do my numbers leave my device?
No. The calculation runs in your browser.