Ohm's Law Calculator
Calculate voltage, current, or resistance using Ohm's Law (V = I x R). Also shows power (P = V x I). Enter any two values to find the third.
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Enter any two values to calculate the third using Ohm's Law.
Ohm's Law
V = I x R (Voltage = Current x Resistance). Also: I = V/R, R = V/I, P = V x I. These are the fundamental relationships in electrical circuits.
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Disclaimer: This tool is provided as-is for informational and educational purposes only.