Ohm's Law Calculator is a mobile application which allows you to use the Ohm's law formula ( I = E / R ) to calculate the voltage, current, resistance, or the resistance value of any single resistor in a circuit using a single, simple GUI. If you would like to use this application without advertisements, you may purchase the premium version of this application for a single dollar. Please feel free to contact me with suggestions to improve this application. Thank you for using Ohm's Law Calculator.