kW and kVA
kW shows useful active power. kVA shows apparent power and includes the effect of power factor.
Calculate current, kW and kVA from voltage and power factor for single-phase or three-phase systems.
All ToolskW shows useful active power. kVA shows apparent power and includes the effect of power factor.
Power factor is the ratio between active and apparent power. Common preliminary estimates often use 0.8.
Single-phase calculations use voltage and current directly; three-phase systems include the square root of 3 factor.