How to use it
- Enter real power in kW.
- Enter apparent power in kVA.
- Calculate power factor and reactive-power magnitude.
Power Factor Calculator
Calculate power factor and an idealized reactive-power magnitude from kW and kVA.
Important: This calculator is for educational and estimation purposes only. It is not electrical safety, installation, engineering, or code-compliance advice. Always consult a qualified electrician or engineer for real-world electrical work.
About the Power Factor Calculator
This calculator compares real power in kW with apparent power in kVA for a simplified power triangle.
How it works
Power factor equals kW ÷ kVA. Reactive power magnitude is calculated as √(kVA² − kW²) and reported in kVAR.
Example
For 80 kW and 100 kVA, power factor is 0.8 and the idealized reactive-power magnitude is 60 kVAR.
Notes
This calculation does not identify leading or lagging behavior, harmonics or correction requirements and is not an equipment-design tool.