How Much Energy Does A Computer Use Per Hour. Add another 20-40 watts for an LCD monitor or about 80 watts if you have an old-school 17 CRT. This translates to up to 1400 kWh annually and is six times higher than a laptops power usage.
Total Hours in use x 100 1000 Total KWh or Units of electricity. This translates to up to 1400 kWh annually and is six times higher than a laptops power usage. Computer Use in Hours x Watts1000 x cost per kilowatt-hour.
A desktop PC typically uses around 100 watts of electricity the equivalent of 01 kWh.
A general computer with 17 intch CRT usual big back monitor takes about 300 watts of current. Most televisions use between 80 to 400 watts depending on the size of the screen and the technology the set uses. Typically desktop monitors consume between 20 to 100 watts of power. A laptop uses between 50 and 100 Whour when it is being used depending on the model.
