According to me, it is not important to know how much carbohydrate, you should consume in a day rather how the carbohydrates are shared throughout the day in your snacks and meals. The percentage of carbohydrates distributed to your meals is based upon certain factors like your weight, height, how much physical work you do in a day, Calories you consume in a day, etc. If a person takes 2000 calories per day, then it is recommended to have about 250 grams of carbohydrates per day.