Question: how many calories do you have to eat a day to be 600 pounds?
Answer: This means you would have to consume 2,300 Calories/day (1,800 + 500 = 2,300 Cal/day). Remember, if we consume 2,300 Calories, the thermic effect of food is going to burn (at most) about 230 Cal/day, or 1,610 Calories/week.