Source Voltage Calculator


Calculating the source voltage in electrical circuits is a fundamental aspect of understanding and designing circuits. To simplify this process, we’ll create a source voltage calculator. This interactive calculator will allow users to input relevant values and instantly obtain the calculated result.

How to Use

To use the source voltage calculator, follow these simple steps:

  1. Input the voltage across the resistor (Vr) in volts.
  2. Enter the current flowing through the resistor (Ir) in amperes.
  3. Click the “Calculate” button to obtain the source voltage (Vs) result.


The formula used for calculating the source voltage (Vs) is:

Vs= Vr + Ir


  • Vs is the source voltage,
  • Vr is the voltage across the resistor,
  • Ir is the current flowing through the resistor.

Example Solve

Let’s work through an example to illustrate how the source voltage calculator functions.

Suppose we have a circuit with a voltage across the resistor (Vr) of 10 volts and a current through the resistor (Ir) of 5 amperes.

The calculated source voltage (Vs) is 15 volts.


Q: Can I input decimal values for voltage and current?

A: Yes, the calculator supports decimal values for precise calculations.

Q: What units should I use for voltage and current?

A: Enter voltage in volts (V) and current in amperes (A) for accurate results.

Q: Is there a limit to the values I can input?

A: The calculator can handle a wide range of values, including large and small numbers.


Creating a source voltage calculator provides a convenient way to quickly determine the source voltage in electrical circuits. By following the steps outlined above, users can easily input values and obtain accurate results.

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