Resistor Voltage Clculator


Calculating resistor voltage in an electronic circuit is crucial for understanding the behavior and performance of components. To simplify this process, we can utilize a resistor voltage calculator. This tool enables engineers, hobbyists, and students to swiftly determine the voltage across a resistor based on Ohm’s Law.

How to Use

  1. Input the value of the resistor in ohms (Ω).
  2. Enter the current flowing through the resistor in amperes (A).
  3. Click on the “Calculate” button to obtain the voltage across the resistor.


According to Ohm’s Law, the formula to calculate voltage (V) across a resistor is:



  • V = Voltage across the resistor (volts)
  • I = Current flowing through the resistor (amperes)
  • R = Resistance of the resistor (ohms)

Example Solve

Let’s consider a scenario where a resistor with a resistance of 100 ohms (Ω) experiences a current of 0.5 amperes (A). Using the formula: V=I×R


V=50 volts

So, the voltage across the resistor is 50 volts.


Q: Why is it important to calculate resistor voltage?
A: Calculating resistor voltage helps in determining the power dissipation and understanding the behavior of components within an electronic circuit.

Q: Can this calculator be used for both DC and AC circuits?
A: Yes, the calculator is applicable for both direct current (DC) and alternating current (AC) circuits.

Q: What units should I use for input values?
A: Input the resistor value in ohms (Ω) and current in amperes (A).

Q: Is there any limitation to the input values?
A: No, you can input any positive numeric values for resistance and current.


The resistor voltage calculator simplifies the process of determining voltage across a resistor, making it easier for engineers, students, and hobbyists to analyze electronic circuits accurately.

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