⚡ Ohm's Law Calculator

Solve V = I × R for any variable.

Voltage (V)

Current (A)

Resistance (Ω)

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Voltage (V)

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Current (A)

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Resistance (Ω)

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Power (W)

V = I × R | Power = V × I

Why Ohm's Law matters?

Fundamental to all electrical circuit design — calculating unknowns, sizing components, ensuring safe operation.