kVA to AmpsCalculator
Convert kVA or kW into design current for DC, single-phase, and three-phase circuits before checking voltage drop and wire size.
Convert transformer, generator, UPS, or equipment kVA into circuit current before running a voltage-drop or wire-sizing calculation. For real-power entries, the calculator uses power factor to estimate the equivalent kVA. Final overcurrent protection and conductor ampacity still require the applicable NEC articles, equipment markings, and local amendments.
Calculator Inputs
Load, voltage, phase, and design margin
Based on 45 kVA at 208 V three-phase.
- kVA already includes voltage and current. Power factor is only needed when starting from kW.
- Three-phase current uses line-to-line voltage and the square-root-of-three multiplier.
- Use the calculated current as an input, then verify voltage drop, ampacity, termination ratings, and equipment instructions.
AC Voltage Drop Calculator
Use the calculated current for single-phase or three-phase AC voltage-drop checks.
DC Voltage Drop Calculator
Apply low-voltage DC current to battery, control, and lighting circuit runs.
Wire Size Calculator
Turn the calculated amperage into a conductor sizing starting point.
Wire Tables
Compare conductor ampacity and resistance data for common AWG and kcmil sizes.
NEC Standards
Review NEC voltage-drop recommendations and ampacity context before final design.