# Watt

The unit of measurement of power. As power is the product of current and volt, watts are measured the same way. For example, 1 amp at 5 volts is 5 watts. Or 5 amps at 1 volt is 5 watts.

Unit of real power. Equal to **I ^{2}R** or

**VI cos θ**.

The **watt** (symbol: **W**) is a unit of power. In the International System of Units (SI) it is defined as a derived unit of 1 joule per second,^{[1]} and is used to quantify the rate of energy transfer. In dimensional analysis, power is described by

^{}