Watts To VA Calculator


Calculating the apparent power in volt-amperes (VA) from the real power in watts is a crucial task in electrical engineering. To simplify this process, a Watts to VA calculator can be a handy tool. In this article, we’ll guide you through the usage of such a calculator, provide the accurate formula for the calculation, demonstrate an example solve, and address frequently asked questions (FAQs).

How to Use

The Watts to VA calculator is designed to streamline the conversion process. Follow these steps for accurate results:

  1. Input the real power in watts in the designated text box.
  2. Click the “Calculate” button to trigger the calculation.
  3. The result, representing the apparent power in volt-amperes, will be displayed on the page.


The formula for converting watts to volt-amperes is as follows:

Apparent Power (VA)=Real Power (Watts)

This formula signifies that the apparent power is equal to the real power, as both are measured in the same unit.

Example Solve

Let’s consider an example to illustrate the application of the formula:

  • Real Power (Watts): 500W

Apparent Power (VA)=500 WA

In this case, the apparent power is also 500 VA.

Frequently Asked Questions (FAQs)

Q1: Is the formula the same for both single-phase and three-phase systems?

A1: Yes, the formula remains the same for both single-phase and three-phase systems as it is a direct conversion of the real power to apparent power.

Q2: Can the calculator handle negative values for real power?

A2: No, the calculator assumes positive values for real power as it represents the magnitude of power.

Q3: Why is the apparent power equal to real power?

A3: In the context of this calculator, the apparent power is assumed to be equal to real power, simplifying the conversion process.


The Watts to VA calculator provides a quick and efficient way to convert real power in watts to apparent power in volt-amperes. By following the simple steps and understanding the underlying formula, users can effortlessly perform these calculations in the field of electrical engineering.

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