About Power Factor Calc

Instant, accurate power factor calculations for single-phase and three-phase AC circuits. Enter your voltage, current, and real power — get PF, apparent power, reactive power, and phase angle with the underlying math explained.

Power Factor Calc is an independent resource focused on electrical power factor calculation and AC power theory. We publish practical, carefully researched guides for readers who want clear answers without the fluff — whether you are just getting started or looking to sharpen what you already know.

What we do

Every article is written and edited to be genuinely useful: accurate, easy to follow, and grounded in real-world experience. We cover topics across Guides and update our guides as best practices evolve. We are not affiliated with any of the brands, products, or organizations we may reference; mentions are for the reader's benefit, not an endorsement.

How we stay free

Power Factor Calc is supported by advertising. We display ads (including ads served by third parties such as Google AdSense) so that our content can remain free to read. Advertising never dictates our editorial recommendations. See our Privacy Policy for details on how ads and analytics work on this site.

Editorial standards & disclaimer

Power Factor Calc is an independent reference tool. Results are for estimation and educational purposes only — always verify calculations with a licensed electrician before any installation or equipment sizing decision.

Our content is provided for general informational purposes only and does not constitute professional advice. Always use your own judgment and consult a qualified professional where appropriate.

Get in touch

Questions, corrections, or feedback are always welcome. Reach us at runbookify@gmail.com or visit our contact page.