## Amps to VA conversion

Electric current in amps (A) to apparent power in volt-amps (VA)

### Single phase amps to VA conversion

In this case, we will be calculating the apparent power *S*, SI unit volt-amps (VA). The apparent power is calculated by multiplying the RMS voltage *V*, in volts with the Current *I*, in amps (A).

*S*_{(VA)} = *I*_{(A)} ×* V*_{(V)}

Therefore:

Volt-amps = Volts × amps

Or

VA = A × V

**Example**

If the current through a circuit is 10A and the Voltage is 110V, what is the apparent power across the circuit?

Solution

*S* = 10A × 110V = 1100VA

### 3 phase amps to VA conversion

Apparent power *S *(VA), in this case, is equivalent to the line in line RMS *V*_{L-L} voltage, in volts (V) times the current *I*, in amps (A) times the square root of 3.

*S*_{(VA)} = *√*3 × *I*_{(A)} ×* V*_{L-L}_{(V)}

Therefore:

Volt-amps is equal to the square root of 3 multiplied by Volts times amps

Volt-amps = *√*3 × amps × volts

Or

VA = *√*3 × A × V

**Example**

Calculate the apparent power, given that the Voltage across a circuit is 110V and the current is 10A

Solution:

S = √3 × 10A × 110V = 1905VA