Single phase amps to kVA calculation formula
The apparent power S in kilovolt-amps is equal to current I in amps, times the voltage V in volts, divided by 1000:
S(kVA) = I(A) × V(V) / 1000
Three phase amps to kVA calculation formula
Calculation with line to line voltage
The apparent power S in kilovolt-amps is equal to phase current I in amps, times the line to line RMS voltage VL-L in volts, divided by 1000:
S(kVA) = √3 × I(A) × VL-L(V) / 1000
Calculation with line to neutral voltage
The apparent power S in kilovolt-amps is equal to phase current I in amps, times the line to neutral RMS voltage VL-N in volts, divided by 1000:
S(kVA) = 3 × I(A) × VL-N(V) / 1000
Where,
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S = Apparent Power in Volt-Amps
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V = Voltage in Volts
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I = Current in Amperes
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VL-L = Line to Line Voltage in 3-Phase Circuits
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VL-N = Line to Neutral Voltage in 3-Phase Circuits