Power Factor Calculator — Calculate Apparent, Real, and Reactive Power

Power Factor Calculator

Calculate power factor, apparent power (kVA), real power (kW), and reactive power (kVAR) for single-phase or three-phase electrical systems. Optimize energy efficiency and reduce electricity costs.

Step 1: Electrical Parameters

Understanding Power Factor

Power factor is the ratio of real power (kW) to apparent power (kVA). A high power factor (close to 1) indicates efficient energy use, while a low power factor means wasted energy and higher electricity costs.

Step 2: Calculation & Results

0.85
31.8°

About Power Factor Correction

Low power factor can increase electricity bills due to utility penalties. Power factor correction capacitors can improve PF, reduce reactive power, and save energy costs.

Power Factor Results

Summary
PF Comparison
Power Triangle

Calculated Power Factor

0.85
For 240V three-phase system at 50A
Apparent Power (S)
20.8 kVA
Real Power (P)
17.7 kW
Reactive Power (Q)
11.0 kVAR
Phase Angle
31.8°

Power Factor Efficiency Comparison

Power Factor Efficiency Reactive Power Energy Cost Impact

Power Triangle Visualization

Power Factor Calculation Formulas

PF = P / S = cos(θ)

Where: P = Real Power (kW), S = Apparent Power (kVA), θ = Phase Angle. For three-phase: S = √3 × V × I, P = √3 × V × I × PF.

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