This calculator will provide you with estimates of energy use costs based on your inputs. The Annual and Monthly results are not intended to be extremely accurate, but rather, to provide a comparison platform to give you the differences between the energy your home is currently using ("Base House") versus various "Scenario" variations. After you run a few variations, be sure to click the View Annual and View Monthly buttons for different views. To go back to view the details of a "Scenario" variation, click on its number.