Ohm's Law

Calculates voltage, current and resistance

Tool options

Variables

Solve For

Voltage

Current

Resistance

Ohm's Law

This calculator applies Ohm's Law (V = I × R) to determine any of the three electrical parameters when the other two are known. Ohm's Law is a fundamental principle in electrical engineering that describes the relationship between voltage (V), current (I), and resistance (R). This tool is essential for electronics hobbyists, electrical engineers, and students working with circuits to quickly solve for unknown values in their electrical designs.

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