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Calculation Machine

Three Phase Power Calculator

kW, kVA and current for 3-phase loads.

Reviewed by James Whitfield · How we check our maths

Your values

ⓘ Live results

Results
Real power
18.84 kW
Apparent power
22.17 kVA
Reactive power
11.68 kVAr
Current per phase
32 A

Quick answer

Three phase power equals √3 times line voltage, line current and power factor.

The formula

P = √3 × V × I × PF

Worked example

Worked example

Using the values the calculator loads with.

Inputs

  • Line voltage400 V
  • Line current32 A
  • Power factor0.85

Result

  • Real power18.84 kW
  • Apparent power22.17 kVA
  • Reactive power11.68 kVAr
  • Current per phase32 A

How to use the Three Phase Power Calculator

  1. 1Enter line-to-line voltage.
  2. 2Enter line current.
  3. 3Enter the load power factor.

Frequently asked questions

Why does power factor matter?

Low PF means you draw more current for the same useful power.

Is 400 V standard?

Yes in most of Europe; 208 V or 480 V in North America.

About this calculator