Basic electrical math
AC Power and Current Calculator
Calculate AC line current and apparent power from real power, voltage, phase, and power factor.
AC power relationships
Enter power and system data
kW
V
Estimated line current
12.5 A
Apparent power3.00 kVA
Calculation onlyAssumes balanced sinusoidal AC and the entered power factor. Verify phase, voltage, harmonics, motor starting, and installation conditions separately.
About this calculator
Calculate AC line current and apparent power from real power, voltage, phase, and power factor.
Use line-to-line voltage and power factor appropriate to the entered phase arrangement.
Method and assumptions
Single-phase current = kW × 1,000 ÷ (V × PF). Balanced three-phase current = kW × 1,000 ÷ (√3 × V × PF).