A medium raw apple contains about 95 calories. That’s for a fruit roughly the size of a tennis ball, weighing around 182 grams with the skin on. Most of those calories come from natural sugars and a meaningful dose of fiber, which makes apples one of the more filling snacks you can grab for under 100 calories.
Calories by Apple Size
Apple sizes vary more than you might expect at the grocery store. A small apple (about 150 grams) has roughly 77 calories. A medium apple comes in at 95 calories. A large apple (around 223 grams) bumps up to about 116 calories. The calorie density stays consistent at roughly 52 calories per 100 grams, so the differences come down purely to how much fruit you’re eating.
If you’re tracking calories closely, weighing your apple gives a more accurate count than eyeballing size. But for most people, the takeaway is simple: even a large apple stays well under 120 calories.
Sugar Content Varies by Variety
Apples get nearly all their calories from sugar, and the amount depends significantly on the variety. Every apple contains more fructose than glucose, but the ratio and total sugar differ quite a bit. Per 100 grams of fruit:
- Granny Smith: 2.3 g fructose, 1.1 g glucose (lowest sugar overall)
- Boskop: 3.1 g fructose, 1.4 g glucose
- Pink Lady: 4.8 g fructose, 1.4 g glucose
- Golden Delicious: 5.2 g fructose, 2.0 g glucose
- Royal Gala: 6.9 g fructose, 2.3 g glucose
- Fuji: 7.7 g fructose, 3.3 g glucose (highest sugar overall)
That’s a threefold difference in fructose between Granny Smith and Fuji. You can taste it: Granny Smith apples are noticeably tart, while Fuji apples are among the sweetest you’ll find. If you prefer a lower-sugar option, tart varieties like Granny Smith and Elstar are your best bet. A whole medium Granny Smith has fewer total grams of sugar than a medium Fuji, which translates to a modest calorie difference as well.
Why Apples Feel More Filling Than Their Calories Suggest
At 95 calories, a medium apple keeps you satisfied for longer than you’d expect from a snack that size. The reason is fiber, specifically the type called pectin, which slows digestion and helps stabilize blood sugar after eating. A medium apple with the skin contains about 4.4 grams of fiber.
A study published in The American Journal of Clinical Nutrition tested this directly. Researchers gave subjects whole apples, pureed apples, and apple juice, each containing the same 60 grams of sugar. Eating whole apples took an average of 17 minutes, compared to 6 minutes for puree and just 1.5 minutes for juice. More importantly, subjects reported significantly greater fullness after the whole apples than after puree, and greater fullness after puree than after juice. Same calories, very different satiety.
The researchers concluded that fiber slows carbohydrate absorption, promotes fullness, and prevents the blood sugar crash that often triggers hunger again shortly after eating. These benefits diminish when the fiber is processed to the point where chewing is no longer required. In other words, the physical structure of a whole apple is part of what makes it satisfying.
Whole Apples vs. Applesauce vs. Juice
How you consume your apple changes the calorie and nutrition picture. A half-cup serving of unsweetened applesauce (122 grams) contains 51 calories, 13.7 grams of carbohydrates, and only 1.3 grams of fiber. That’s less fiber per serving than a whole apple, and because applesauce is easier to eat quickly, you’re likely to consume more of it in one sitting.
Apple juice is further removed. An 8-ounce glass of apple juice contains around 114 calories with essentially no fiber. You’re drinking concentrated sugar without the structural components that slow digestion and signal fullness. Two glasses of juice can easily match the calories of three whole apples while leaving you far less satisfied.
If your goal is keeping calories in check, the whole fruit is the clear winner. The fiber, the chewing time, and the water content all work together to make a 95-calorie apple feel like a real snack rather than a brief sugar hit.
Blood Sugar Impact
Despite containing natural sugar, apples have a low glycemic index of about 39 out of 100 and a glycemic load of just 6. For context, a glycemic load under 10 is considered low, meaning apples cause a slow, modest rise in blood sugar rather than a sharp spike. This is largely because the fiber in the fruit slows sugar absorption into the bloodstream.
This makes apples a practical snack even for people watching their blood sugar. The combination of low glycemic load, moderate calories, and high satiety is why apples consistently show up on lists of recommended whole fruits for blood sugar management.
Skin On or Off
Peeling an apple removes about a third of the fiber and a significant portion of the beneficial plant compounds concentrated just beneath the skin. It also slightly reduces the calorie count, but not in a meaningful way. You lose maybe 10 calories by peeling a medium apple while giving up a gram or more of fiber. Since that fiber is what makes the apple filling and keeps blood sugar stable, eating the skin is worth it from a nutrition standpoint.