Electrical Calculators
This tool helps you to calculate amperage quickly. Enter phase number, apparent power in kilovoltamps, voltage in volts and press Calculate button to get current in amps:
Convert kva to amps
Single phase kVA to amps calculation formula
The current I in amps is equal to 1000 times the apparent power S in kilovoltamps, divided by the voltage V in volts:

 I(A) = 1000 × S(kVA) / V(V)
Three phase kVA to amps calculation formula
1.Calculation with line to line voltage
The phase current I in amps (with balanced loads) is equal to 1000 times the apparent power S in kilovoltamps, divided by the square root of 3 times the line to line RMS voltage VLL in volts:


 I(A) = 1000 × S(kVA) / (√3 × VLL(V) )

2.Calculation with line to neutral voltage
The phase current I in amps (with balanced loads) is equal to 1000 times the apparent power S in kilovoltamps, divided by 3 times the line to neutral RMS voltage VLN in volts:


 I(A) = 1000 × S(kVA) / (3 × VLN(V) )
