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Power Factor Calculator

Calculate power parameters in AC circuits

Current (I):

A

Power Triangle ▼

True Power (P)

Reactive Power (Q)

VAR

Apparent Power (S)

VA

Phase Angle

Power Factor

Unitless

R, X, and Z ▼

Resistance (R)

Ω

Reactance (X)

Ω

Impedance (Z)

Ω

Power Factor Calculation Guide

True Power (P): Actual power consumed by the circuit (in Watts)
Reactive Power (Q): Power stored and released by inductive/capacitive elements (in VAR)
Apparent Power (S): Vector sum of true and reactive power (in VA), calculated as: S = √(P² + Q²)
Power Factor (PF): Ratio of true power to apparent power: PF = P / S
Phase Angle (θ): Angle between voltage and current waveforms: θ = arccos(PF)
In impedance calculations: Z = √(R² + X²) where R is resistance, X is reactance, and Z is impedance