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Amps to VA calculator FullScreen

Convert electrical current in amperes (A) to apparent power in volt-amperes (VA). Ideal for understanding the power requirements of electrical equipment and sizing electrical systems. Obtain an estimation of apparent power in VA from amperes using this convenient online tool.

Select phase #:  
Enter amps: A
Enter line to line volts: V
Result in volt-amps: VA


What is Amps to VA calculator

To convert amps (A) to volt-amps (VA), you need to know the voltage (V) at which the electrical device operates. The formula for converting amps to VA is straightforward:

VA = A x V

Simply multiply the amperage (A) by the voltage (V) to obtain the apparent power in volt-amps.

For instance, if you have a load with a current of 10 amps and an operating voltage of 120 volts, you can calculate the apparent power in volt-amps (VA) as follows:

VA = 10 A x 120 V VA = 1200 VA

In this scenario, the load has an apparent power of 1200 volt-amps.

It's important to note that volt-amps (VA) represent the apparent power in an electrical circuit. For AC (alternating current) circuits, where reactive components are present, the apparent power is generally different from the actual power or real power consumed by the load, which is measured in watts (W). To calculate real power, the power factor (PF) also needs to be considered.

Single phase amps to VA calculation formula

The apparent power S in volt-amps is equal to current I in amps, times the voltage V in volts:

S(VA) = I(A) × V(V)

3 phase amps to VA calculation formula

The apparent power S in kilovolt-amps is equal to square root if 3 current I in amps, times the line to line voltage VL-L in volts:

S(VA) = 3 × I(A) × VL-L(V)  = 3 × I(A) × VL-N(V)

Amps to VA calculator Example

To convert Amps (A) to Volt-amps (VA), you simply need to multiply the current (A) by the voltage (V). The formula for this conversion is:

VA = Amps × Voltage

Here's an example that demonstrates the calculation using a calculator:

Let's assume you have a load with a current draw of 10 Amps (A) and a voltage of 120 Volts (V):

VA = 10 A × 120 V = 1200 VA

Therefore, with a current draw of 10 Amps and a voltage of 120 Volts, the apparent power or VA would be 1200 VA.

It's important to note that in this calculation, we are assuming a power factor of 1. If your load has a different power factor, you may need to consider using kilovolt-amperes (kVA) instead. Additionally, for loads with reactive components, such as inductive or capacitive loads, further calculations may be required to account for the reactive power (VAR).