Power Factor

Power factor and reactive power calculations.

Calculators

Power Factor Calculator
Calculate power factor from real power and apparent power (PF = P ÷ S).

Guides & Examples

Guide
What Is Power Factor
Power factor explained: what it measures, why it matters, and how it relates to real, reactive, and apparent power.
Formula
Power Factor Formula
The power factor formula, its variables, and how to rearrange it to find real or apparent power.
Example
Power Factor Examples
Worked, step-by-step examples calculating power factor, real power, and apparent power.