# Ohm’s Law Calculator

The following calculator works out either voltage, current or resistance, given the other two parameters, using the equation:

$$V = IR$$
where:
$$V$$ = voltage across the resistor
$$I$$ = current through the resistor
$$R$$ = resistance of the resistor

 Variable: Value: Units: Calculate What? Variable Diagram: $$V$$ $$I$$ $$R$$

Featured on the Resistors page.