Ohm's Law Calculator

Find voltage, current, or resistance from any two values.

How Ohm's law is calculated

Ohm's law relates voltage, current, and resistance in a simple linear equation.

If voltage and resistance are known, current is I = V / R. If voltage and current are known, resistance is R = V / I.

Provide at least two values to solve for the remaining quantity.

Ohm's Law Calculator FAQs