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Power & Electrical

Power Factor Calculator

Calculate power factor from real power and apparent power.

Power factor varies with load and equipment. Use measured values for final assessment.

Notes and next steps

How it works

Calculate power factor from real power and apparent power.

Formula used: Power factor = kW รท kVA.

Worked example

8 kW and 10 kVA gives a power factor of 0.80.

Common mistakes
  • Using watts with kVA without converting.
  • Assuming PF is always 1.0.
  • Ignoring manufacturer data.
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