Apples and Diabetes: Carbs, Glycemic Index and Portions
A large apple has about 31 g of carbohydrate (25 g net). Glycemic index: low (39 to 44). Yes. Whole apples, eaten with the skin, are a fiber-containing fruit that fits well in a carbohydrate-aware plan.
An apple is a handy, portable fruit with a good amount of fiber, much of it in the skin. Whole fruit is generally a better choice than juice or applesauce with added sugar, because chewing and fiber slow things down.
Size is the thing to watch. A small apple and a very large one can differ by many grams of carbohydrate, so use the table below to match the apple in your hand to a portion.
Carbs in apples by portion
| Portion | Grams | Carbs (g) | Fiber (g) | Net carbs (g) | Protein (g) |
|---|---|---|---|---|---|
| cup, quartered or chopped | 125 | 17 | 3 | 14 | 0.4 |
| cup slices | 109 | 15 | 2.6 | 12 | 0.3 |
| large | 223 | 31 | 5.4 | 25 | 0.7 |
| 100 g (for comparing foods) | 100 | 14 | 2.4 | 11 | 0.3 |
Source: USDA FoodData Central, FDC ID 171688 (Apple). Net carbs here means carbohydrate minus fiber. “Net carbs” is not an FDA-defined term, so total carbs are shown too. Values are estimates for a typical item; brands, ripeness and size vary.
Glycemic index and glycemic load
GI ranks how fast a food raises blood glucose compared with pure glucose (100). Low is 55 or less, medium 56 to 69, high 70 or more. Different apple varieties give slightly different values in the studies. Glycemic load multiplies the index by the available carbohydrate in a portion (carbs minus fiber), so it reflects how much you actually eat: low is 10 or less, medium 11 to 19, high 20 or more.
Which published values we used (4)
| Entry | Food as listed | GI |
|---|---|---|
| Suppl. Table 1, #1078 | Apples, raw | 44 |
| Suppl. Table 2, #2889 | Apple, Golden Delicious | 39 |
| Suppl. Table 2, #2890 | Apple, Golab, raw | 39 |
| Suppl. Table 2, #2892 | Apple, Green, raw | 41 |
Atkinson FS et al. International tables of glycemic index and glycemic load values 2021. Am J Clin Nutr 2021;114(5):1625-1632. Glucose reference (glucose = 100); values from studies that used white bread were converted by the authors. Where studies differ we show the range, not an average.
Glycemic index is only one piece of the picture. The same food can give a different response depending on ripeness, cooking, what you eat it with and your own body, so your meter or CGM is the best guide.
How apples fit the plate method
Apples count toward the carbohydrate quarter of the plate in the plate method, along with grains, starchy vegetables, fruit and milk. The CDC describes the plate method as half non-starchy vegetables, a quarter protein and a quarter carbohydrate foods. See the diabetic meal plan guide for how it works, or drop apples onto a meal in the meal planner to watch the plate fill.
Portion ideas and pairings
- Choose a small or medium apple for a snack.
- Slice it into a measured cup if you are counting carbs closely.
- Dried apple and apple juice are far more concentrated, so portions are much smaller.
Pairs well with: peanut or almond butter, a slice of cheese, plain Greek-style yogurt.
Related foods
Banana
1 medium: 27 g carbs
Strawberries
cup, halves: 12 g carbs
Watermelon
cup, balls: 12 g carbs
Grapes
cup: 27 g carbs
See all foods and the low glycemic foods list
Frequently asked questions
Is apple juice the same as an apple?
No. Juice has the sugar without most of the fiber and is easy to drink in large amounts. Whole fruit is the usual recommendation, and juice is better saved for treating a low.
How many carbs are in a large apple?
About 31 g of carbohydrate, of which about 5.4 g is fiber, so roughly 25 g net carbs. Values are from USDA FoodData Central for 223 g and are estimates; brands and sizes vary.
Information only, not medical advice. Your care team may set different targets for you, and only a lab test ordered by a clinician can diagnose diabetes or prediabetes. See our medical disclaimer.
Sources
- USDA FoodData Central: Apple (FDC ID 171688)
- Atkinson FS et al. International tables of glycemic index and glycemic load values 2021. Am J Clin Nutr 2021;114(5):1625-1632
- CDC: Diabetes Meal Planning (plate method and carbohydrate counting)
- ADA Standards of Care in Diabetes—2026, Section 5: Facilitating Positive Health Behaviors
Last reviewed: by the Diabetes Blogs editorial team. Information only, not medical advice.
