Ohm's Law: I=V/R

The basic equation for Ohm's Law is I=V/R, or Current = Voltage / Resistance.
From this, you can derive the equation for Resistance as:
Resistance = Voltage / Current (or R=V/I)
And you can derive the equation for Voltage as:
Voltage = Current * Resistance (or V=IR)
Input any two variables below (only two) and press the red buton to calculate the third variable.