On average females can have 3-4 servings of carbs for each meal, and a serving of carbs in between meals. A serving of carbohydrates is 15 grams of carbs. On average, a male can have 5-6 servings of carbs for each meal and a serving of carb in between each meal. Remember, though, that the type of carb matters to. As a diabetic, you should choose carbs that are whole grains.