Ohms law calculator


What is Ohms Law?

Ohm’s Law is a formula used to calculate the relationship between voltage, current, and resistance in an electrical circuit.

To students of electronics, Ohm’s Law (V = IR) is as fundamentally important as Einstein’s Relativity equation (E = mc²) is to physicists.

V = I x R

When spelled out, it means voltage = current x resistance, or volts = amps x ohms, or V = A x Ω.

Named for German physicist Georg Ohm (1789-1854), Ohm’s Law addresses the key quantities at work in circuits: