Yes, we know. Another environmental footprint calculator? Unlike more general calculators, this one is tailored to your home and uses the information from your bills to recommend ways to save energy and money. It's the closest thing to a free "home dashboard" we've found, allowing you to track how much energy you waste annually...

To calculate your stats, you'll need to know the square footage of your home and the approximate year it was built. You'll also need 12 months of energy bills: electricity, natural gas, fuel oil, propane, or kerosene. To create your home energy yardstick, click here.

Photo: A Portand Rummer via ReNest.