16th October 2019


How much wattage does a computer use?

A desktop computer uses between 60 and 250 watts, depending on whether it is idle. A laptop consumes 15 to 45 watts. A 22-inch LCD monitor uses an average of 25 watts, while an older 17-inch cathode ray monitor would use about 80 watts.

Besides, how much power does a computer use?

The power consumption of a computer varies depending on whether it is a desktop or a laptop: A desktop uses an average of 200 W/hour when it is being used (loudspeakers and printer included). A computer that is on for eight hours a day uses almost 600 kWh and emits 175 kg of CO2 per year.

What is the power consumption of a desktop computer?

A typical desktop computer uses about 65 to 250 watts. To find the figure for your particular computer you can contact the manufacturer (not me), or see my section on measuring electrical use. Add another 20-40 watts for an LCD monitor, or about 80 watts if you have an old-school 17" CRT.

How much electricity is consumed by laptop?

This is on the low end of power consumption for a laptop. Over an hour of usage it uses 12 Wh of electricity, which is 83 hours of use per kWh. With an average cost of electricity of 12c/kWh, this means that for $1 in electricity I can run my laptop for 651 hours.