An Ohm's Law calculator is an essential tool for anyone working with electrical circuits, enabling the calculation of voltage, current, resistance, or power when two of these variables are known. Ohm's Law, a fundamental principle in electronics, states that the current 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 expressed by the formula V = I × R, where V represents voltage, I denotes current, and R signifies resistance. By inputting any two known values into the calculator, users can quickly determine the remaining variables, facilitating efficient analysis and design of electrical systems. Such calculators are invaluable for engineers, electricians, and hobbyists alike, ensuring accurate and efficient circuit analysis and design.