The Current Calculator is based on Ohm’s Law, which states that the electric current (I) in a circuit is equal to the voltage (V) divided by the resistance (R). By entering the values of voltage and resistance, this calculator quickly determines how much electric current flows through the circuit in amperes. It helps users understand the direct relationship between voltage, current, and resistance, making it an essential tool for students, electricians, and physics learners. If the resistance value is set to zero, the calculator shows an error because division by zero is undefined. This simple yet effective tool is widely used in electrical circuit analysis, electronics design, and physics experiments.