A diabetic should aim to consume at least 130 grams of carbohydrates per day, according to Healthline. Carbohydrate intake should be spread evenly throughout the day to prevent dangerous increases in blood sugar.
The right number of carbohydrates for a diabetic depends on his daily caloric intake, states Healthline, as a diabetic should get no more than 65 percent of his daily calories from carbohydrates. Someone following a 2,200-calorie-per-day diet should not eat more than 1,430 calories from carbohydrates, for example. Because diabetics have an increased risk for heart disease, high blood pressure and high cholesterol, they must also limit their intake of sodium and saturated fat.