Electrical Calculators
AC Power

Three-Phase Power Calculator

Three-Phase Power Calculator. Single-phase, balanced three-phase, apparent power and power-factor calculations. Calculations run in your browser. Entered electrical values are not uploaded to our server.

Inputs
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Calculations run in your browser. Entered electrical values are not uploaded to our server.
ⓘMathematical estimate only. Verify equipment datasheets, manufacturer instructions, electrical codes and qualified design before real-world use. Do not work on energized electrical systems unless you are qualified and authorized to do so.

Formula & method

Balanced system: S = √3 × VLL × I; P = S × PF

Worked example

400 V × 10 A × √3 × PF 1.0 ≈ 6928.203 W

Assumptions & safety boundary

Mathematical estimate only. Verify equipment datasheets, manufacturer instructions, electrical codes and qualified design before real-world use. Do not work on energized electrical systems unless you are qualified and authorized to do so.