AC Power and Power Factor Calculator
Calculate real, reactive and apparent power for sinusoidal single-phase or balanced three-phase circuits.
AC Power and Power Factor Calculator User manual
- Fill in the parameters or select the file according to the form, and check the unit and format first.
- Estimate input power with a three-phase line voltage of 400 V, line current of 10 A and power factor of 0.8.
- Click the processing button to view the results, you can copy or download and save.
Calculation method and processing rules
Single phase: S=UI. Balanced three phase: S=√3UI. Real power P=S×PF and reactive power magnitude Q=S√(1-PF²).
scope of use
Use RMS voltage and current; three-phase inputs are line quantities. Not suitable for harmonics, unbalanced loads or certified equipment sizing.
Will the input content be saved on the server?
This tool handles input in the browser, and does not upload files or form content. Typing practice scores are only saved in the native browser.
Why may the result be different from other tools?
Use RMS voltage and current; three-phase inputs are line quantities. Not suitable for harmonics, unbalanced loads or certified equipment sizing. Please compare the input unit, rounding method, applicable rules and data version first.