How Many Watts Does a Laptop Run On?


Quick Answer

Most laptops use about 20 to 75 watts, as of 2014. The exact amount varies based on the specific laptop, the task it is performing and whether the battery is fully charged.

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Full Answer

An HP Compaq 6910p with the Windows Vista operating system consumed 47 watts when the battery was already charged. Consumption increased to 99 watts when charging a low battery. A laptop designed for more high-energy tasks, such as video games, consumes more than a standard laptop. Desktop computers usually consume much more energy, since laptops are designed to run on battery power. Desktop computers use about 200 to 400 watts.

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