3-Phase Power Calculator
Calculate Active Power (P), Reactive Power (Q), Apparent Power (S), and line/phase voltages and currents for 3-phase AC electrical systems in Star (Y) or Delta (Δ) configurations.
Common: 380V, 400V, 480V (LV) / 4160V, 13800V (MV/HV)
Inductive loads (motors) typically 0.80–0.90; purely resistive is 1.0
Calculation Results
| Active Power P | — kW |
| Reactive Power Q | — kvar |
| Apparent Power S | — kVA |
| Power Factor cos φ | — |
| Phase Voltage Uφ | — V |
| Phase Current Iφ | — A |
Core Formulas
P = √3 × UL × IL × cos φ
Q = √3 × UL × IL × sin φ
S = √3 × UL × IL
cos φ = P / S
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