ELECTRICAL / CALCULATOR
Power Factor
Convert active power, apparent power and power factor, and calculate reactive-power magnitude.
Input Parameters
Edit the example values. Results update as you type.
Results
- Power Factor cosφ
- 0.8
- Apparent Power S
- 10kVA
- Reactive Power Magnitude
- 6kvar
Formula
cosφ = P / S · |Q| = √(S² − P²)Substitution
cosφ = 8,000 / 10,000 = 0.8Calculation Steps
- Convert power to W and VA before substitution.
- Use the power triangle to calculate reactive power magnitude, then convert to kvar.
Result Explanation
Uses the sinusoidal steady-state power triangle. With significant harmonics, verify displacement and total power factor separately.
Formulas and FAQ
cosφ = P / S · |Q| = √(S² − P²)Does the result indicate inductive or capacitive operation?
This calculates reactive-power magnitude for sinusoidal steady state. The voltage-current phase relation determines inductive or capacitive operation.