Some fruits that contain 15 grams or less of carbohydrates per serving are watermelon, strawberries, cantaloupe, cranberries and plums. There are 5.5 grams of carbohydrates in 1/2 cup of diced watermelon. A serving size for strawberries, which also is 1/2 cup, contains 6.5 grams of carbs, according to the Michigan State University Extension.
Some fruits that contain 15 grams or greater of carbs are nectarines and oranges. Nectarines contain vitamin A, potassium and fiber while oranges are good sources of vitamin C, flavonoids and phytochemicals.
People with diabetes may need to count carbs when they are planning their meals. The American Diabetes Association suggests that diabetics choose fresh fruits, 100 percent fruit juice or dried fruits to incorporate into their meal plans. Approximately 2 tablespoons of dried fruits like raisins can contain 15 grams of carbs. People with diabetes can eat many fruits, but they should also be aware of the glycemic index, or GI, associated with them. For example, melons, pineapples and certain dried fruits have a medium value for the GI.