For single phase kVA calculations or conversions we need to know two of the three values of kVA, Volts and Amps. Calculations could be kVA from Amps and Volts, Amps from kVA and Volts or Volts from kVA and Amps.
For three phase kVA calculations we also need to know the Power Factor and kW values.
There are a number of kVA formulas which maybe difficult to remember them all, in which case you may like to download our kVA Calculator App.
kVA Single Phase Calculations
– kVA CALCULATION FORMULA:
kVA to Amps Formula
To convert kVA to Amps we use this formula (single phase)
Example: If kVA = 4.6 and voltage = 230 then the calculation would be 4.6 x 1000 / 230 = 20 Amps
Amps to kVA Formula
To convert Amps to kVA we use this formula (single phase)
kVA = Amps x Volts / 1000
Example: If amps = 15 and volts = 120 the calculation would be 15 x 120 / 1000 = 1.8 kVA
Volts to kVA Formula
To calculate the voltage from kVA there is this formula (single phase)
Volts = kVA x 1000 / Amps
Example: If kVA = 40 and amps = 10 then the calculation is 40 x 1000 x 10 = 4000 volts
kVA Three Phase Calculations
Three Phase kVA to Amps Calculation
Calculating Amps from kVA Three Phase
Amps = kVA / Volts / 1.732 x 1000
Example: If kVA = 50 and volts= 400 then the calculation would be 50 / 400 / 1.732 * 1000 = 72.17 Amps
Three Phase Amps to kVA Calculation
Calculating Three Phase kVA from Amps formula
kVA = Amps x Volts x 1.732 / 1000
Example: So if Amps = 25 and volts = 400 then 25 x 400 x 1.732 / 1000 = 17.32 kVA
Three Phase Volts to kVA Calculation
Calculating Three Phase Volts from kVA formula
Volts = kVA / Amps / 1.732 x 1000
Example: So if kVA= 32 and amps = 63 then the calculation would be 32 / 63 / 1.732 x 100 = 293 Amps
kVA to kW to Power Factor Formula
To calculate to or from kVA, kW or Power Factor (PF) we have the following calculations
kVA = kW / Power Factor
Example: If kW = 5 and Power Factor = 0.8 then 5 / 0.8 = 6.25 kVA
kW = kVA x Power Factor
Example: If kVA = 14 and Power Factor = 0.7 then 14 x 0.7 = 9.8 kW
PF = kW / kVA
Example: If kW = 15 and kVA = 25 then 15 / 25 = 0.6 Power Factor
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