technology ToolUpdated 2026-09-21
Ohm's Law Calculator
Ohm's Law is the fundamental relationship in electrical engineering between Voltage (V), Current (I), and Resistance (R). Use this calculator to solve for any unknown electrical parameter from any two known values.
Frequently Asked Questions
What are the four core formulas of Ohm's Law?
The four interconnected equations are: V = I × R (Voltage), I = V / R (Current), R = V / I (Resistance), and P = V × I (Power in Watts).
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