To kVA calculate we need to know two of the three values of kVA, Volts and Amps. For three phase kVA calculations we also need to know the Power Factor and kW values.
How to Calculate kVA
There are a number of kVA formulas which maybe difficult to remember, in which case you may like to download our kVA Calculator App for iOS and Android.
Single Phase kVA Calculations
This section explains how to carry out single phase kVA calculations
How to Convert kVA to Amps
Single Phase:
To calculate Amps from kVA we use the formula Amps = kVA x 1000 / Volts
Example: If kVA = 4.6 and voltage = 230 then the calculation is 4.6 x 1000 / 230 = 20 Amps
How to Convert Amps to kVA
Single Phase:
To calculate kVA from Amps we use the formula kVA = Amps x Volts / 1000
Example: If amps = 15 and volts = 120 the calculation is 15 x 120 / 1000 = 1.8 kVA
kVA Three Phase Calculations
This section explains how to carry out three phase kVA calculations.
Three Phase kVA to Amps Calculation
To convert kVA to Amps three phase we can use this formula Amps = kVA / Volts / 1.732 x 1000
Example: If kVA = 50 and volts= 400 then the calculation is 50 / 400 / 1.732 * 1000 = 72.17 Amps
Three Phase Amps to kVA Calculation
To calculate Three Phase kVA from Amps the formula is kVA = Amps x Volts x 1.732 / 1000
Example: If Amps = 25 and volts = 400 then the calculation is 25 x 400 x 1.732 / 1000 = 17.32 kVA
kVA to kW to Power Factor Calculations
To calculate to or from kVA, kW or Power Factor there are 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
When calculating or working out kVA, kW or power factor select the relevant calculation formula from above, alternatively you can download the kVA Calculator App for your mobile device.
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