kVA Calculator

Calculate apparent power in kVA instantly. Enter voltage and current for single-phase or three-phase systems.

Apparent power in kVA — single-phase or three-phase.

System type

Voltage (V)

Current (I) — amps

Apparent power (S)–

Apparent power–

Single-phase: kVA = V × I ÷ 1000 · Three-phase: kVA = √3 × V × I ÷ 1000