Maintaining Target Weight - as part of the expert series by GeoBeats. If you have reached your target weight, congratulations! What you would want to do is gradually increase your calories by around 250 calories a day for a week. And then, weigh yourself, and if you are still losing weight, then you want to bump those calories up another 250 calories a day until your weight stabilizes. Once your weight stabilizes, then you know that is the right amount of calories to maintain your ideal body weight.