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Online Calculator
Power factor calculator
Enter active and apparent power to calculate fp = P/S and related quantities.
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Local processing
The values are processed directly in your browser.
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Frequently asked questions
What is the power factor formula?
fp = P/S.
What is its range?
In this model the power factor is between 0 and 1.
How is the angle calculated?
φ = arccos(fp).
How is the reactive power calculated?
|Q| = √(S² - P²).