U.S. EPA's Household Carbon Footprint Calculator gives you a estimate of your personal or family’s greenhouse gas emissions and explore the impact of taking various actions to reduce your emissions. To use the calculator:
- You can get a quick, rough estimate of your carbon footprint by using U.S. average values. They are provided (along with other useful information) in the "tool tips" throughout the calculator.
- For a more accurate estimate, use your own numbers. Gather your utility bills (electricity, natural gas, fuel oil, propane) to calculate your average use over a year. You can find your car's rated fuel efficiency at fueleconomy.gov, or you can calculate your car's actual efficiency.
- To work offline or see the formulas behind the calculator, you can download it as a spreadsheet.