Apparent Power Calculator

Calculate apparent power from voltage and current (S = V × I).

Formula

S = V × I

S: Apparent power, in volt-amps
V: Voltage, in volts
I: Current, in amps

What this calculator does

Calculates apparent power (total supplied power) from voltage and current.

Use cases

Size a transformer or generator based on apparent power demand
Compare apparent power against real power to estimate power factor
Check a supply's volt-amp capacity against expected load