Power-Factor Calculator

Single phase circuit calculation

Power factor calculation:

PF = |cos φ| = 1000 × P(kW) / (V(V) × I(A))

Apparent power calculation:

|S(kVA)| = V(V) × I(A) / 1000

Reactive power calculation:

Q(kVAR) = √(|S(kVA)|2 - P(kW)2)

Power factor correction capacitor's capacitance calculation:

Scorrected (kVA) = P(kW) / PFcorrected

Qcorrected (kVAR) = √(Scorrected (kVA)2 - P(kW)2)

Qc (kVAR) = Q(kVAR) - Qcorrected (kVAR)

C(F) = 1000 × Qc (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 = |cos φ| = 1000 × P(kW) / (√3 × VL-L(V) × I(A))

Apparent power calculation:

|S(kVA)| = √3 × VL-L(V) × I(A) / 1000

Reactive power calculation:

Q(kVAR) = √(|S(kVA)|2 - P(kW)2)

Power factor correction capacitor's capacitance calculation:

Qc (kVAR) = Q(kVAR) - Qcorrected (kVAR)

C(F) = 1000 × Qc (kVAR) / (2πf(Hz)×VL-L(V)2)