An apple contains less than half a gram of starch that comes from the fruit's total carbohydrate content. An apple has a total amount of about 25 grams of carbohydrates.
Almost all the calories in an apple come from many types of carbohydrates, a macronutrient needed for the energy of cells. Most of the carbohydrates contained in the fruit, about 24 grams, are made up of naturally occurring sugar, or fructose, which quickly converts into glucose during digestion. An apple also has 4 grams of fiber, but unlike starch, this carb does not convert into glucose and has no calories, so it does not count toward the total amount of the apple's carbohydrates.