Voltage Calculator

How to Use the Voltage Calculator

This voltage calculator helps you determine the voltage in an electrical circuit using Ohm's Law and the power equation. You can calculate voltage when you know any two of the following: current, resistance, or power.

Voltage Calculation Formulas

The formulas used to calculate voltage are:

\[V = I \times R\] \[V = \frac{P}{I}\] \[V = \sqrt{P \times R}\]

Where:

• V is voltage in volts (V)
• I is current in amperes (A)
• R is resistance in ohms (Ω)
• P is power in watts (W)

Calculation Steps

1. Identify the known values in your circuit (at least two are needed)
2. Enter these values into the calculator
3. Click the "Calculate" button
4. The calculator will determine the voltage using the appropriate equation

Example Calculation

Let's walk through an example calculation using our Voltage Calculator:

Scenario: Known Current and Resistance

Given:

• Current (I) = 2 A
• Resistance (R) = 6 Ω

Step 1: Use the formula V = I × R

\[V = I \times R = 2 \text{ A} \times 6 \text{ Ω} = 12 \text{ V}\]

Therefore, the voltage in this circuit is 12 V.

Voltage in Circuit Diagram

This diagram illustrates a simple circuit with voltage (V), resistance (R), and current (I). The voltage source provides the electrical potential difference across the circuit, driving the current through the resistor.