kVA Calculator

Calculate to or from kVA, kW, Power Factor (PF), Amps and Volts, includes single phase (1-phase) and three phase (3-phase) kVA and kW electrical calculations.

This kVA Calculator is the essential electrical calculator for electricians and engineers. Quickly convert or calculate kVA, kW and Power Factor or kVA, Volts and Amps — no more manual formula lookups.

Perfect for converting kVA to Amps, or kW to KVA when sizing generators or UPS systems.

Includes Single Phase and Three Phase, kW and kVA electrical calculations.

Enter any two values to calculate the third.

kVA Single Phase (1-Phase) Calculations:

• Calculate kVA.
• Calculate Volts.
• Calculate Amps.

kVA Three Phase (3-Phase) Calculations:

• Calculate kVA.
• Calculate Volts.
• Calculate Amps.

kVA, Power Factor & kW Calculations:

• Calculate kVA.
• Calculate Power Factor.
• Calculate kW.

Electrical units are measured in the following: Current (I) = Amps. Power (P) = Watts (or kW). Volts (V) = Voltage.

Supports dark mode and 16 languages.

Simple, fast, and accurate — the kVA calculator you'll reach for every day.

Trusted by the professionals since 2011.