Carb grams/day range*: 180–308 grams. Carb grams/meal range (3 meals per day): 60–103 grams. *Based on 45%–­65% of calories from carbohydrate. Note: These recommendations are the same for a woman of small stature who wants to maintain weight.he biggest problem is too many total calories and the types of calories consumed. Research shows Americans eat too much added sugar (22 teaspoons a day, which translates to about 350 calories!) and not enough fruits, vegetables, whole grains, and low-fat dairy foods.