5. Lastly, if you use this method to get to your goal weight, whether you lose more weight or gain it back will depend on how much food you eat! To maintain your goal weight when you reach their, you would multiply you body weight by a factor of 13-15. For example, if you are at 150 pounds now and wish to stay there then your daily calorie intake will be around 1950-2250. You’ll have to eat close to this for at least two weeks and then adjust accordingly. If you are gaining, cut back a little and if you are still losing, you can add more food.