## Power factor calculator

Power factor calculator. Calaulate power factor, apparent power, reactive power and correction capacitor's capacitance.

- Select phase number.
- Enter real power in kilowatts (kW).
- Enter phase current in amps (A).
- For three phase, select voltage type.
- Enter voltage in volts (V).
- Enter AC frequency in Hertz (Hz) - needed only for capacitance calculation.
- Press the calculate button to get the power factor.
The power factor correction capacitor should be connected in parallel to each phase load.

## Single phase circuit calculation

Power factor calculation:

PF= |cosφ|= 1000 ×P_{(kW)}/ (V_{(V)}×I_{(A)})Apparent power calculation:

|S_{(kVA)}| =V_{(V)}×I_{(A)}/ 1000Reactive power calculation:

Q_{(kVAR)}= √(|S_{(kVA)}|^{2}-P_{(kW)}^{2})Power factor correction capacitor's capacitance calculation:

C_{(F)}= 1000 ×Q_{(kVAR)}/ (2πf_{(Hz)}×V_{(V)}^{2})## Three phase circuit calculation

For three phase with balanced loads:

## Calculation with line to line voltage

Power factor calculation:

PF= |cosφ|= 1000 ×P_{(kW)}/ (3 ×√V_{L-L(V)}×I_{(A)})Apparent power calculation:

|S_{(kVA)}| =3 ×√V_{L-L(V)}×I_{(A)}/ 1000Reactive power calculation:

Q_{(kVAR)}= √(|S_{(kVA)}|^{2}-P_{(kW)}^{2})Power factor correction capacitor's capacitance calculation:

C_{(F)}= 1000 ×Q_{(kVAR)}/ (2πf_{(Hz)}×V_{L-L(V)}^{2})## Calculation with line to neutral voltage

Power factor calculation:

PF= |cosφ|= 1000 ×P_{(kW)}/ (3 ×V_{L-N(V)}×I_{(A)})Apparent power calculation:

|S_{(kVA)}| = 3 ×V_{L-N(V)}×I_{(A)}/ 1000Reactive power calculation:

Q_{(kVAR)}= √(|S_{(kVA)}|^{2}-P_{(kW)}^{2})Power factor correction capacitor's capacitance calculation:

C_{(F)}= 1000 ×Q_{(kVAR)}/ (3×2πf_{(Hz)}×V_{L-N(V)}^{2})

## See also