CALCULATE YOUR CARBON FOOTPRINT

We bet you never thought math would help save the world. But don't feel guilty if you zoned out in algebra class. Our handy calculator will help you figure out whether or not your carbon footprint looks like tracks made by Bigfoot while wearing a pair of clown shoes.

We've already provided U.S. average usage in each field. But if you've got your bills handy, just plug in your own data to get the most acurate levels. Here are some other nifty ways to use the calculator.

• Want to offset just one flight? Enter 0 for all the other numbers and just plug the mileage into the air travel box.
• Figure out how to offset an event or a conference. If you don't know exact energy figures, contact Carbonfund.org and they'll help you estimate them.
• See the difference between individual emissions and individual zero carbon emissions. Individual emissions are from stuff like heating your home, driving and flying. Individual Zero Carbon emissions takes into account all economic activity to give a more accurate idea of how much CO2 emission you're really responsible for. It includes factors like your job and the things you purchase.