## Single phase Amps to kVA calculation formula

S_{(kVA)} = I_{(A)} × V_{(V)} / 1000

The apparent power **S** in kilovolt-amps (kVA) is equal to the phase current **I** in amps (A), multiplied by the RMS voltage **V** in volts (V), divided by 1000.

So,

*kVA = A x V / 1000*

*kilovolt-amp = amp x volt / 1000*

**For example:**

*Phase current (I) = 2,5A*

*Voltage (V) = 110V*

*Power (S) = 2,5A x 110V / 1000 = 0,275kVA*

## 3 phase Amps to kVA calculation formula

### Line to line voltage

S_{(kVA)} = √3 × I_{(A)} × V_{L-L(V)} / 1000

The apparent power **S** in kilovolt-amps (kVA) is equal to square root of 3, multiplied by the phase current **I** in amps (A), multiplied by the line to line RMS voltage **V**_{L-L} in volts (V), divided by 1000.

So,

*kVA = √3 × A x V / 1000*

*kilovolt-amp = √3 × amp x volt / 1000*

**For example:**

*Phase current (I) = 2,5A*

*Voltage (V) = 110V*

*Power (S) = √3 x 2,5A x 110V / 1000 = 0,476kVA*

### Line to neutral voltage

S_{(kVA)} = 3 × I_{(A)} × V_{L-N(V)} / 1000

The apparent power **S** in kilovolt-amps (kVA) is equal to 3, multiplied by the phase current **I** in amps (A), multiplied by the line to neutral RMS voltage **V**_{L-N} in volts (V), divided by 1000.

So,

*kVA = 3 × A x V / 1000*

*kilovolt-amp = 3 × amp x volt / 1000*

**For example:**

*Phase current (I) = 2,5A*

*Voltage (V) = 110V*

*Power (S) = 3 x 2,5A x 110V / 1000 = 0,825kVA*