PowerConvert™ Fast Electrical Power Calculators
kW to Amps Calculator
Work out the current a load draws in amps from its power. Enter a kW or kVA rating with the system voltage, phase, and power factor. The result updates as you type.
How it is calculated
For three phase, amps = (kVA x 1000) / (1.732 x volts). For single phase, drop the 1.732. When you enter kW, the calculator first converts to kVA using kVA = kW / power factor.
A 1 kW load at 400 V three phase, power factor 0.8: kVA = 1 / 0.8 = 1.25, amps = 1250 / (1.732 x 400) = 1.80 A.
Frequently asked questions
How do you convert kW to amps?
Convert kW to kVA by dividing by the power factor, then divide by the voltage, and by 1.732 as well for three phase. So amps = (kW x 1000) / (1.732 x volts x power factor) on a three phase supply.
Does power factor matter when you enter kVA?
No. kVA already represents apparent power, so amps from kVA do not use power factor. Power factor only applies when you start from kW.
How do you convert kVA to amps?
Divide the kVA by the voltage, and by 1.732 for three phase: amps = (kVA x 1000) / (1.732 x volts).