The Power in Circuit Calculator determines the electrical power consumed or produced in a circuit using the basic formula P=V×IP = V \times IP=V×I, where P represents power in watts, V is the voltage in volts, and I is the current in amperes. By entering the voltage and current values, this calculator instantly computes how much power is being used by the electrical component or system. It helps students and professionals understand the direct relationship between voltage, current, and power, making it a valuable tool for physics experiments, electronic circuit design, and energy analysis.