GE has added a new interactive graphic on their website that details common appliances and the amount of power they use. You can choose which appliances you wish to “buy”, and it will add them up and present you with a “bill” — a report of total energy usage in kilowatts, dollars, or in terms of gallons of gas.

The data used is averaged from multiple sources, including the DoE’s Energy Star program, and from a number of public utility companies. If you want a more accurate value and/or do it yourself, you might consider using a Tweet-A-Watt.