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Ohm’s Law Calculator
Our Ohm’s Law calculator below has been designed to help with calculating Voltage (V), Current (I), Resistance (R) and Power (P) using Ohm’s Law.
Enter two values into the boxes provided and the calculations for the remaining values will automatically appear.
What is Ohm's Law?
Ohm’s Law (E = IR) is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit.
The full forumal is E = I x R where E = Volts, I=current (in amps), and R=resistance. This is also sometimes annoted as voltage = current x resistance, or volts = amps x ohms, or V = A x Ω.
The table below highlights our wide range of leading resistor manufacturers and some of their key attributes: