How to use the power factor correction calculator
Find the reactive power a capacitor bank must supply to raise a load power factor. Enter real power, existing power factor, target power factor in the fields above; the required reactive compensation, apparent power after correction are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “power factor correction kvar”, “capacitor bank size”, “raise power factor”, “calculate power factor correction”, “find required reactive compensation”.
Formula
Variables
- P — Real power (W)
- pf1 — Existing power factor
- pf2 — Target power factor
Worked example
With real power = 10000 W, existing power factor = 0.7, target power factor = 0.95, the calculator gives required reactive compensation ≈ 6.9152 kvar; apparent power after correction ≈ 10.52632 kVA.
Frequently asked questions
What is the power factor correction calculator used for?
Find the reactive power a capacitor bank must supply to raise a load power factor. It helps with questions such as “power factor correction kvar”, “capacitor bank size”, “raise power factor”.
What is the formula for the power factor correction calculation?
Required reactive compensation (kvar) = P × (√(1-pf1^2) / pf1-√(1-pf2^2) / pf2) / 1000. Apparent power after correction (kVA) = P / pf2 / 1000. Here P is real power (W), pf1 is existing power factor, pf2 is target power factor.
What inputs do I need for the power factor correction calculator?
You need real power in W, existing power factor, target power factor. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the power factor correction calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the power factor correction result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.