MarketWatch, a Website from Dow Jones, recently published an article about home energy use calculators that includes several interesting links to such calculators. Some of the calculators are quite comprehensive, allowing consumers to determine the power consumed by nearly every appliance in a home. They can even gauge the cost of using a single light bulb. The article says the calculators and the questions they are based on are most helpful in building awareness about things like cost of outdated refrigerators and insufficient insulation. When reading the article you should also be aware that Energy Star also has a calculator on its Home Energy Saver Website. Entering your Zip Code will reveal the average energy bill in your area and the projected utility cost of an energy efficient home. You can get to the Home Energy Saver site from the Owens Corning Website, where there are three more calculators for consumers. The easiest and quickest gives you the DOE recommended R-values for a home in your Zip Code. An Insulation Project Calculator has only a few more questions. The Home Report Card® Quiz takes you through a series of questions and covers more than insulation. Be prepared to spend some time with these calculators; the savings may make you glad you did.