Others may need to have less carbohydrate to keep their blood glucose in control. Finding the balance for yourself is important so you can feel your best, do the things you enjoy, and lower your risk of diabetes complications. A place to start is at about 45-60 grams of carbohydrate at a meal.You may need more or less carbohydrate at meals depending on how you manage your diabetes. You and your health care team can figure out the right amount for you.Once you know how much carb to eat at a meal, choose your food and the portion size to match.inding the balance for yourself is important so you can feel your best, do the things you enjoy, and lower your risk of diabetes complications. A place to start is at about 45-60 grams of carbohydrate at a meal. You may need more or less carbohydrate at meals depending on how you manage your diabetes.