https://docs.google.com/spreadsheets/d/1MszYEgqg9smJSUVRQlelNtOMmPW-5inCyj_haeHuFJw/edit?usp=sharing this is a draft carbon footprint calculator I'm working on. The largest part of carbon footprint is our direct fuel use, but I have also completed a section on foods. It works for me, might not work so well for you depending on how diet differences. But it should be reasonably close. Consider saving a personal copy if you want to play around with it - since anyone can edit, it might get messed up; I will periodically replace it from backup if I see it is being used much. I will also continue to develop, and I will appreciate comments in the spreadsheet and try to address critiques, with my meager abilities.