Berries are among the lowest-sugar fruits you can eat. Most common varieties contain between 4 and 10 grams of sugar per 100-gram serving (roughly ¾ cup), which is significantly less than fruits like bananas at 12.2 grams per 100 grams. But the range varies quite a bit depending on the type of berry and whether it’s fresh, frozen, or dried.
Sugar Content by Berry Type
Here’s how common berries compare per 100-gram serving (about ¾ cup for most fresh berries):
- Cranberries (raw): 4 g of sugar
- Raspberries: 4.4 g of sugar
- Blackberries: 4.9 g of sugar
- Strawberries: 4.9 g of sugar
- Blueberries: 9.4 g of sugar
Cranberries, raspberries, blackberries, and strawberries cluster together at the low end, all under 5 grams per 100 grams. Blueberries contain nearly twice as much sugar as those four, which surprises people who think of all berries as interchangeable. That said, even blueberries still have less sugar than a banana, an apple, or a mango.
How Berries Compare to Other Fruits
The gap between berries and other popular fruits is meaningful if you’re watching your sugar intake. A banana has 12.2 grams of sugar per 100 grams, grapes come in around 16 grams, and mangoes hover near 14 grams. Strawberries and raspberries deliver less than half the sugar of a banana, gram for gram.
Berries also have lower glycemic index values than most fruits, meaning they raise blood sugar more slowly. Raspberries have a GI of about 30, while blueberries and strawberries sit around 40. For context, a banana lands around 51 and watermelon hits 76. This slower blood sugar response is partly because berries are high in fiber relative to their sugar content. Raspberries, for instance, pack about 6.5 grams of fiber per 100 grams, which slows the absorption of their sugars.
Fresh, Frozen, and Dried: The Sugar Difference
Fresh and plain frozen berries have essentially the same sugar content. Freezing doesn’t change the sugar concentration in the fruit itself. However, commercially frozen strawberries are sometimes pretreated with added sugar before freezing. The sugar acts as a preservative, helps retain flavor, and reduces texture damage from ice crystals. If you’re buying frozen berries, check the ingredients list for added sugars or syrups. Bags labeled “unsweetened” or with only the fruit listed will match the sugar content of fresh.
Dried berries are a completely different story. Removing the water concentrates everything, including sugar, into a much smaller, denser package. Fresh cranberries have just 4 grams of sugar per 100 grams, but most dried cranberries on store shelves are sweetened during processing and can contain 70 or more grams of sugar per 100 grams. Even dried goji berries, which are typically sold without added sweetener, contain 12.8 grams of sugar in just 28 grams (about 5 tablespoons). That’s more sugar in a small handful than you’d get in a full cup of fresh strawberries. If sugar content matters to you, dried berries deserve closer label reading than fresh ones.
Portion Sizes and Carb Counting
A standard serving of most fresh berries is ¾ cup to 1 cup, according to the American Diabetes Association. At that portion, you’re looking at roughly 15 grams of total carbohydrate, which includes both sugar and fiber. For someone counting carbs, berries can be swapped for other carb sources like a small roll or a serving of dairy.
The high fiber content of berries is worth paying attention to here. Because fiber isn’t digested the same way sugar is, the net carb impact of berries is lower than their total carb count suggests. A cup of raspberries might have around 15 grams of total carbs, but nearly half of that is fiber. This is one reason berries show up on nearly every list of recommended fruits for people on low-carb or blood sugar-conscious diets. You get sweetness, volume, and nutrients without a sharp glucose spike.
Less Common Berries to Watch
If you’re branching out beyond the grocery store basics, sugar content varies widely. Goji berries are almost always sold dried, and 28 grams contain 12.8 grams of sugar alongside 3.6 grams of fiber. That’s a high sugar-to-fiber ratio compared to fresh raspberries or blackberries. Mulberries, açaí, and golden berries all fall somewhere in the middle when fresh, but they’re rarely available that way. As with cranberries, the dried versions sold in stores often have added sugar, so the nutrition label matters more than the name on the front of the package.
The simplest rule: the berries you find in the produce section (strawberries, blueberries, raspberries, blackberries) are consistently low in sugar. The further a berry gets from its fresh, whole form, the more likely its sugar content has climbed.