What's my carbon offset?

Two sites to determine your carbon offsets, or how much it would cost you to offset the amount of carbon (in tons) that you give off by living, are The Carbon Fund and Native Energy. These sites allow you to plug in some information about your lifestyle such as your home, car, flight/bus information if you use those, and it calculates how much money it would cost you to offset. You can even, if you feel so inclined, pay that offset! Check out these sites! Let me know if you think you know of another site that you feel is more accurate about calculating ones offset price!