DC volts to kilowatts formula: P(kW) = V(V) × I(A) / 1000
AC single phase volts to kilowatts: P(kW) = PF × I(A) × V(V) / 1000
AC three phase volts to kilowatts: P(kW) = √3 × PF × I(A) × VL-L(V) / 1000