Calculate apparent, real, and reactive power for balanced three-phase loads. Supports both Star (Y) and Delta (Δ) connections.
V
A per phase (identical)
Lagging (inductive)
° — edit PF or angle, the other updates automatically
Apparent Power (S)
—
kVA
Real Power (P)
—
kW
Reactive Power (Q)
—
kVAR
Phase Voltage (Vph)
—
V
Phase Current (Iph)
—
A
Power Triangle
φ = —° (—)
S = — kVA
P = S × cos φ = — kW
Q = S × sin φ = — kVAR
Formulas (balanced load)
Star (Y)
Vph = VLL / √3
Iph = IL
Delta (Δ)
Vph = VLL
Iph = IL / √3
S = √3 × VLL × IL
P = √3 × VLL × IL × cos φ
Q = √3 × VLL × IL × sin φ