I tried to figure out how many watts a person runs on who eats a 2,000 calorie diet. First, dietary calories are really kilocalories, so someone eating a 2,000 calorie diet is really eating 2,000,000 calories. 1 calorie is 4.184 joules, so multiply 2 million by 4.184 and you get 8,368,000 joules. Divide that by seconds in a day, 86,400, and you get 96.85. Is that right? Does the average person run on 96.85 watts?