What is the formula for calculating electrical power (P) in watts?

The formula for calculating electrical power (P) in watts is P = V x I. In this formula, V represents the voltage in volts, and I represents the current in amperes. This relationship indicates that electrical power is produced when voltage is applied across a load and current flows through it.

The unit of power, the watt, is defined as one volt multiplied by one ampere. Therefore, this formula clearly illustrates how power can be derived from voltage and current, emphasizing the direct proportional relationship between them. Understanding this formula is essential for evaluating the energy consumption of electrical devices and designing electrical systems efficiently.

This equation is fundamental in electrical engineering and practical installations, as it aids in determining the required specifications for circuits and ensures that components are capable of handling the expected power loads.