Which unit is used to measure real power?

The unit used to measure real power is Watts. Real power, also known as active power, refers to the actual power consumed by electrical devices to perform useful work. It is the component of electrical power that is converted into mechanical energy, light, heat, or other forms that perform work in a circuit.

Watts are calculated as the product of voltage (in volts) and current (in amperes) multiplied by the power factor, which accounts for the phase difference between current and voltage in AC circuits. Therefore, Watts effectively quantify the energy consumed by devices in a tangible way, making it an essential unit in both residential and commercial energy consumption contexts.

In contrast, Volts measure electric potential, Amperes measure electric current, and VAR (Volt-Amperes Reactive) is a unit of reactive power, which does not perform actual work. Thus, Watts stands out as the appropriate measure for real power among these choices.