Ohm's Law Calculator

Provide any two values below to calculate the remaining two values based on Ohm's Law.

Voltage (V)

Current (I)

Resistance (R)

Power (P)

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Ohm's Law and Power Formulas

Ohm's Law states that the current (I) through a conductor is directly proportional to the voltage (V) across it and inversely proportional to its resistance (R).

$ V = I \times R $

Electrical power (P) is the rate at which energy is transferred, calculated as voltage multiplied by current.

$ P = V \times I $