A medium raw apple (about 182 grams) contains roughly 25 grams of carbohydrates. That includes about 19 grams of sugar and around 4 grams of fiber, putting the net carb count at approximately 21 grams.
Carbs by Apple Size
The 25-gram figure is based on a medium apple, which the USDA defines as 182 grams (about 6.4 ounces). Most apples you grab at the grocery store fall in this range, but size matters more than you might think. A small apple around 150 grams will have closer to 20 grams of carbs, while a large apple pushing 220 grams can top 30 grams. If you’re tracking carbs for diabetes management or a keto diet, weighing the apple gives you a more accurate count than eyeballing it.
Sugar Breakdown in Apples
Not all the sugar in an apple is the same. Apple flesh contains three main sugars: fructose makes up the largest share, followed by sucrose, then glucose. Fructose is processed by your liver rather than spiking blood sugar the way pure glucose does, which is one reason whole apples have a gentler effect on blood sugar than you’d expect from a fruit with 19 grams of sugar.
The remaining carbohydrates come from fiber and small amounts of starch. That fiber, especially the soluble type called pectin, slows down how quickly sugar enters your bloodstream.
How Different Varieties Compare
Sweeter varieties do contain more sugar, but the gap is smaller than most people assume. Fuji apples sit at the high end, with about 15% more total sugar than Granny Smith apples in conventional growing conditions. Granny Smith compensates with significantly more malic acid, which is what gives it that tart, sour bite. The total carbohydrate difference between the sweetest and tartest varieties works out to only a few grams per apple.
If you’re choosing based on carbs alone, Granny Smith is the standard low-sugar pick. Fuji, Gala, and Honeycrisp tend to run higher. But the practical difference is modest enough that taste preference matters more for most people.
Peeled vs. Unpeeled
Peeling an apple removes about half its fiber. A peeled apple (110 grams) has roughly 1.4 grams of fiber compared to about 2.6 grams for the same amount with skin on. Since fiber is a carbohydrate your body doesn’t digest, peeling slightly raises the net carb count. More importantly, that lost fiber means sugar from a peeled apple hits your bloodstream a bit faster. Eating the skin is the simplest way to slow down the sugar absorption.
Blood Sugar Impact
Despite having 25 grams of carbs, a medium apple has a glycemic index of just 39, which falls in the low category (anything under 55 is considered low). The glycemic load, which accounts for actual portion size, comes in at 6. For context, a glycemic load under 10 is low, meaning a whole apple produces a relatively small blood sugar response.
This is why apples are generally well tolerated even by people watching their blood sugar. The combination of fiber, fructose (which doesn’t spike blood glucose directly), and the physical structure of the fruit all slow digestion. Applesauce and apple juice lose much of this advantage because the fiber is either removed or broken down, which lets the sugar absorb much faster.
Apples Compared to Other Fruits
- Banana (medium, 118g): about 27 grams of carbs, with a higher glycemic index around 51
- Orange (medium, 131g): about 15 grams of carbs
- Strawberries (1 cup, 152g): about 12 grams of carbs
- Grapes (1 cup, 151g): about 27 grams of carbs
Apples land in the middle of the pack for fruit carbohydrates. They carry more carbs than berries or citrus but deliver a lower blood sugar response than bananas or grapes, thanks to their fiber content and sugar composition. For people on low-carb diets, a small apple at around 20 grams of carbs can fit into a daily limit of 50 grams, though it takes up a significant chunk of the budget. On keto diets targeting under 20 grams total, even a small apple is a stretch.