Granny Smith apples are some of the sourest apples around due to their high acid content. It’s also hard to find a small Granny Smith apple, because most of them are medium or large in size!

So does that mean they’re high in calories?
Here’s the answer: a medium-sized Granny Smith apple contains around 72 calories.
That’s the average amount of calories for a Granny Smith apple, which includes eating the skin. And compared with other apple varieties, it’s quite low!
But if you want to know the amount of calories in small and large Granny Smith apples, as well as the calories for other apple varieties for comparison, make sure to keep reading – you’ll find everything you need to know below.
How Many Calories In A Small Granny Smith Apple?
Granny Smith apples are usually medium to large in size. It’s possible to find small Granny Smith apples, though, which, needless to say, have fewer calories in them than their medium and large counterparts.
A small Granny Smith apple, around 6.5 centimeters in diameter, contains about 55 calories.
So if you’re watching your calorie intake and weight, it should go without saying that small Granny Smith apples are your best choice!
How Many Calories In A Medium Granny Smith Apple?
We mentioned the calories in a medium-sized Granny Smith apple above, but what size exactly is a medium apple?
A medium Granny Smith apple is considered to be around 7 centimeters in diameter. And as mentioned earlier, it contains about 72 calories.
So, in general, this is the average amount of calories in most Granny Smith apples. Compared with a small Granny Smith apple, a medium-sized Granny Smith contains around 17 more calories.
How Many Calories In A Large Granny Smith Apple?
Large Granny Smith apples are just as common as medium Granny Smiths – and more common than small Granny Smith apples. So how many calories do they contain?
A large Granny Smith apple, around 8.5 centimeters in diameter, contains about 110 calories.
Compared with a small Granny Smith, a large Granny Smith apple has around 55 more calories – double the amount. Compared with a medium Granny Smith, the difference is around 38 calories.
How Many Carbohydrates In A Granny Smith Apple?
If you’re watching your calories, you might be watching your carbohydrates as well. So how do Granny Smith apples measure up when it comes to carbs?
- A small Granny Smith apple, around 6.5 centimeters in diameter, contains about 15 grams of carbohydrates.
- A medium Granny Smith apple, around 7 centimeters in diameter, contains about 19 grams of carbohydrates.
- A large Granny Smith apple, around 8.5 centimeters in diameter, contains about 29 grams of carbohydrates.
So the difference in the amount of carbs isn’t that big but, hey, it’s still worth knowing if you’re keeping track of your macros!
How Much Sugar Is In A Granny Smith Apple?
Granny Smith apples are known for being sour and slightly sweet. In fact, it’s why a lot of people prefer them! But does that mean Granny Smith apples are high in sugar?
- A small Granny Smith apple, around 6.5 centimeters in diameter, contains about 11 grams of sugar.
- A medium Granny Smith apple, around 7 centimeters in diameter, contains about 14 grams of sugar.
- A large Granny Smith apple, around 8.5 centimeters in diameter, contains about 22 grams of sugar.
And for comparison, Granny Smith apples, as well as green apples in general, typically have less sugar in them than the most popular red apple varieties.
Are Granny Smith Apples Healthy?
Despite their sour flavor and subtle sweetness, Granny Smith apples are among some of the healthiest apple varieties around.
Green apples are generally considered healthier than red apples, since most green apples contain less sugar, less carbohydrates, and fewer calories.
What’s more, green apples, including Granny Smiths, are also known to have more potassium, fiber, iron, protein, and vitamin K!
On the other end, Gala, Fuji, Honeycrisp, and Pink Lady apples are considered to have the most sugar in them. As a result, these red apple varieties are also generally higher in calories.
Still, it all depends on the size of the apple you’re eating. For example, a small Pink Lady apple might have a similar amount of calories and sugar as a small Granny Smith apple.
Are Granny Smith Apples Good For Weight Loss?
Granny Smith apples have around 72 calories in them per serving, including the skin. This is a lower calorie amount than most sweet apple varieties, like Fuji apples and Pink Lady apples.

In general, though, Granny Smith apples are a good choice of apple if you’re watching your calorie intake and weight.
The amount of calories in Granny Smith apples is quite low, and they’re also highly nutritious, which can make the amount of calories worth it!
Like all weight loss diets, you will lose weight as long as you maintain a caloric deficit. This means consuming fewer calories than you need to maintain your weight (calorie maintenance).
In other words, you can eat as many Granny Smith apples (or even slices of pizza) as you like and still lose weight as long as you maintain a consistent caloric deficit through healthy eating and exercise!
Bottom Line
To summarize, most medium-sized Granny Smith apples, around 7 centimeters in diameter, contain around 72 calories.
Small Granny Smith apples contain around 55 calories while large Granny Smith apples contain around 110 calories.
Compared with other apple varieties, especially red apples, Granny Smith apples are considered healthier due to their typically lower calorie, carbohydrate, and sugar content.
Green apples are also considered more nutritious due to their higher amount of vitamins and minerals.
So if you’re watching your weight but love Granny Smith apples, you can rest assured that they’re among the healthiest apple varieties.
The fact that Green Smith apples are highly nutritious can even make their (small amount of) calories worth it!
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