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Ohm's Law Calculator

This calculator allows you to calculate voltage ( V ), current ( I ), or resistance ( R ) using Ohm's Law. Enter any two values to calculate the third.

How Does Ohm's Law Work?

Ohm's Law is a fundamental principle in electrical engineering and electronics. It describes the relationship between voltage ( V ), current ( I ), and resistance ( R ):

Voltage ( V ): The electric potential difference between two points. It is measured in volts (V).
Current ( I ): The flow of electric charge in a circuit. It is measured in amperes (A).
Resistance ( R ): The opposition to the flow of current. It is measured in ohms (Ω).

The relationship is expressed mathematically as:

V = I × R

Using this formula, you can calculate any one of the three variables if you know the other two:

To find Voltage: V = I × R
To find Current: I = V ÷ R
To find Resistance: R = V ÷ I

This calculator simplifies the process by allowing you to input any two values, and it will compute the third for you.