Carbohydrates are part of a daily balanced diet and a primary source for energy to fuel every process in the body. Getting carbohydrates from whole food sources such as blueberries also gives you a dose of nutrients. Blueberries are high in antioxidants and contain 84 calories per 1 cup serving.

According to the USDA Nutrient Database, a cup of raw blueberries -- the equivalent of 148 grams -- contains 21.5 grams of total carbohydrates. These carbs include 3.5 grams of total fiber and 15 grams of total sugars. The fiber found in the pulp and skin of blueberries is both soluble and insoluble dietary fiber.

Carbohydrates include starches, sugars and fiber. Fiber is an important part of your daily balanced diet because it helps regulate digestion, balance blood cholesterol levels and improves heart health. The Harvard School of Public Health advises that most adults need at least 20 to 30 grams of fiber per day. Snacking on blueberries and other fruits gives you a good dose of fiber towards this total.