So if you eat a 2000-calorie diet, you should aim for about 225 to 325 grams of carbs per day. But if you need to lose weight, you will get much faster results eating around 50 to 150 grams of carbs. In fact, a popular alternative called the low-carb diet has been shown to be much more effective for weight loss than the high-carb diet that has been recommended for the past few decades.