kVA to Amps 3 Phase Calculator
Balanced three-phase kVA to line current (A) using line-to-line RMS voltage. For single-phase, phase toggle, and richer workflow, use the main kVA to Amps calculator.
Input Parameters
Quick: kVA and line-to-line V. Advanced: match bus voltage (400 / 415 / 480); unbalance and harmonics are not modeled.
About this calculator
Converts balanced three-phase kVA and line-to-line voltage into line current (A) for feeder screening before harmonics or unbalance. For single-phase, presets, and richer next steps, use the main kVA to Amps calculator or the power calculator hub.
Calculation Results
Line current (approx.): 14.43 A
Default: 10 kVA @ 400 V L-L, balanced three-phase. I = (kVA × 1000) ÷ (√3 × V)
Screening estimate; apply derating and code tables before procurement. More controls: full kVA to Amps.
Engineering disclaimer
Educational screening only. Confirm interrupting ratings, coordination, and conductor ampacity with a licensed engineer and adopted codes.
Quick examples (balanced three-phase)
- 10 kVA at 400 V → ~14.4 A
- 25 kVA at 480 V → ~30.1 A
Formula & explanation
I = (kVA × 1000) ÷ (√3 × V), with V as line-to-line RMS voltage.
Full kVA to amps, kW to kVA, or 3-phase power; browse the power calculator hub.
Frequently Asked Questions
What is the formula for kVA to amps in 3 phase?
Use I = (kVA x 1000) / (sqrt(3) x V), where V is line-to-line voltage.
Why is sqrt(3) used in 3 phase calculations?
Three-phase power relationships include a vector factor between phase and line quantities, which appears as sqrt(3) in current conversion.
What voltage should I use?
For 3 phase conversion, use the system line-to-line voltage such as 400 V, 415 V, or 480 V.