Ohm's Law Calculator
Ohm's law states that the current passing through a conductor between two points is directly proportional to the voltage across the two points, and inversely proportional to the resistance between them. This relationship is described by the following equation:
I = V / R or displayed as:
This used by crossing out the value to which you want the result. Where I is the current in amperes (A), V is the voltage in volts (V), and R is the resistance ohms (Ω). This how I remember the formula.
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Enter the values below to calculate the unknown value:
| Voltage | Current | Resistance |
|---|---|---|