AC Power Calculator

Calculate real, reactive, and apparent power in an AC circuit. Enter the voltage, current, and power factor to find the different components of power.

AC Power Parameters

V
A

AC Power Formulas

In AC circuits, power has three components: real power, reactive power, and apparent power.

  • Real Power (P): The actual power consumed by the load. Measured in Watts (W).
  • Reactive Power (Q): The power that oscillates between the source and the load. Measured in Volt-Amps Reactive (VAR).
  • Apparent Power (S): The vector sum of real and reactive power. Measured in Volt-Amps (VA).
S = V * I
P = S * cos(θ)
Q = S * sin(θ)

Frequently Asked Questions

What is power factor?

Power factor is the ratio of real power to apparent power. It is a number between 0 and 1 that represents the efficiency of power usage. A power factor of 1 means all the power is being used for useful work.