I like to understand my daily electronics consumption. I understand an average desktop computer has a power usage of between 80 and 250 watts hour of "active" use, depending on graphics cards and additional peripherals. A laptop is 50 to 100 W/hour. In stand-by mode the power consumption of both a desktop and a laptop falls to about a third. The cost to the University to operate a typical computer and monitor workstation (130 watts @ 11c kW/h) for 24 hours per day, 7 days per week, 365 days per year, is $129.73. It appears from electric bill I am 10 kW/h. My energy use to date start from 2/22 is 207.31 kWh. I use my laptop and dual monitors pretty frequently for 7 hours a day / 5 days a week. Can someone explain the math here?