## How to convert amps to kVA

How to convert electric current in amps (A) to apparent power in kilovolt-amps (kVA).

You can calculate kilovolt-amps from amps and volts, but you can't convert amps to kilovolt-amps since kilovolt-amps and amps units do not measure the same quantity.

## Single phase amps to kVA calculation formula

The apparent power S in kilovolt-amps is equal to phase current I in amps, times the RMS voltage V in volts, divided by 1000:

S_{(kVA)}=I_{(A)}×V_{(V)}/ 1000So kilovolt-amps are equal to amps times volts divided by 1000.

kilovolt-amps = amps × volts / 1000

or

kVA = A · V / 1000

## Example

What is the apparent power in kVA when the phase current is 12A and the RMS voltage supply is 110V?

Solution:

S= 12A × 110V / 1000 = 1.32kVA## 3 phase amps to kVA calculation formula

## Calculation with line to line voltage

The apparent power S in kilovolt-amps (with balanced loads) is equal to square root of 3 times the phase current I in amps, times the line to line RMS voltage V

_{L-L}in volts, divided by 1000:

S_{(kVA)}=√3 ×I_{(A)}×V_{L-L(V)}/ 1000So kilovolt-amps are equal to

√3 times amps times volts divided by 1000.kilovolt-amps =

√3 × amps × volts / 1000or

kVA =

√3 × A · V / 1000## Example

What is the apparent power in kVA when the phase current is 12A and the line to line RMS voltage supply is 190V?

Solution:

S=√3 × 12A × 190V / 1000 = 3.949kVA

## Calculation with line to neutral voltage

The apparent power S in kilovolt-amps (with balanced loads) is equal to 3 times the phase current I in amps, times the line to neutral RMS voltage V

_{L-N}in volts, divided by 1000:

S_{(kVA)}= 3 ×I_{(A)}×V_{L-N(V)}/ 1000So kilovolt-amps are equal to 3 times amps times volts divided by 1000.

kilovolt-amps = 3 × amps × volts / 1000

or

kVA = 3 × A · V / 1000

## Example

What is the apparent power in kVA when the phase current is 12A and the line to neutral RMS voltage supply is 120V?

Solution:

S= 3 × 12A × 120V / 1000 = 4.32kVA

## See also