The Resistance Calculator calculates electrical resistance using Ohm’s Law, which states that resistance RRR equals voltage VVV divided by current III — expressed as R=VIR = \frac{V}{I}R=IV​. Here, RRR is measured in ohms (Ω), VVV in volts, and III in amperes. By entering the voltage and current values, users can quickly find the resistance of a circuit or component. This calculator is useful for electronics students, electricians, and engineers when analyzing or designing electrical circuits.