Capacitor kvar = kW × (tan φ1 − tan φ2). Real power stays the same. Apparent power and line current fall as the power factor rises.
A sizing guide, not a capacitor specification. Check harmonic loads before fitting plain capacitors, and confirm the target with the supply company if a penalty or export limit applies.
These tools are quick guides for a ballpark figure. They are not certified design or test software, and a result on this page is not a design, a certificate, or a substitute for the current edition of BS 7671. Check the working and cross-reference it before you apply it to a real installation. Thanet Electrical Ltd does not accept liability for loss or cost arising from reliance on these figures, except where the law does not allow that liability to be excluded, including death or personal injury caused by negligence.
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