Skip to main content
ElecToolsHQ

Three Phase Power Calculator

Calculate three-phase real power from line voltage, current, and power factor (P = √3 × V × I × PF).

Formula

P = √3 × V × I × PF

P
Real power, in watts
V
Line-to-line voltage, in volts
I
Line current, in amps
PF
Power factor, between 0 and 1

What this calculator does

Calculates real power delivered by a balanced three-phase circuit from line voltage, current, and power factor.

Use cases

  • Find the power draw of a three-phase motor from nameplate current
  • Size a feeder or panel for a known three-phase load
  • Verify a measured three-phase power reading against the expected calculation

Related