After complaining about it a little calorie calculators, I have some empirical evidence to back me up. I loaded this spreadsheet up in Google Spreadsheets and put in some approximate numbers. It confirms what I’m thinking: all those calculators assume you’re covering flat land. But add in a 9% grade and the energy used changes dramatically. Now, I realized I’m not going to be hitting a 9% grade consistently. I’d die. But at least I can see that I am going to be burning a lot more calories than what the calculators are telling me.