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Calculator Tools
Electrical Engineering Calculators

Three Phase Power Calculator

Three-phase power, current and kVA from line voltage, current and power factor.

Enter values

Results update as you type.

Result

Real power

12.4708 kW

Apparent power
13.8564 kVA
Reactive power
6.0399 kVAR
Output power
11.8472 kW
Horsepower
15.887

For sizing guidance only — all installation work must follow local wiring regulations.

About the Three Phase Power Calculator

Three-phase power, current and kVA from line voltage, current and power factor.

Also known as: 3 phase power, three phase current, kva calculator, 3 phase amps.

How to use this calculator

  1. Enter calculate, line voltage, power factor, efficiency and the other fields.
  2. The result updates instantly as you type — press Calculate (or Enter) at any time.
  3. Review the breakdown shown under the main result.
  4. Use Copy result or Share to save the answer or send a link with your inputs.

Formula

P = √3 × V_line × I_line × PF

Worked example

Using the values pre-filled in the calculator above:

  • Calculate: Power from current
  • Line voltage = 400 V
  • Line current = 20 A
  • Power factor = 0.9
  • Efficiency = 95 %

the calculator returns:

  • Real power: 12.4708 kW
  • Apparent power: 13.8564 kVA
  • Reactive power: 6.0399 kVAR
  • Output power: 11.8472 kW