Three-phase power calculator

P = √3 × V_line × I_line × cosφ. Star (Y): V_L = √3 × V_phase; I_L = I_phase. Delta (Δ): V_L = V_phase; I_L = √3 × I_phase.

Active power P
0 kW
Apparent power S
0 kVA
Reactive power Q
0 kVAR
V_phase
0 V
I_phase
0 A
Shaft (mech) power
0 kW

Reference

  • India industrial: 415 V line-to-line, 240 V line-to-neutral (star).
  • Europe industrial: 400 V line / 230 V phase.
  • US industrial: 480 V line / 277 V phase (or 208/120 V).
  • Active (kW) = useful work. Reactive (kVAR) = magnetising. Apparent (kVA) = vector sum — what the cable and meter actually carry.