All fruits contain sugar, but the amounts vary dramatically. A single mango packs about 46 grams of sugar, while an entire avocado has roughly 1 gram. The type of fruit you choose, how ripe it is, and whether it’s fresh, dried, or juiced all change how much sugar you’re actually consuming.
Fruits With the Most Sugar
Mangoes top the list. One whole mango delivers around 46 grams of sugar, which is more than a can of soda. Grapes come in next at about 23 grams per cup, followed by cherries at 18 grams per cup. Pears and watermelon wedges each contain around 17 grams, and two medium figs have about 16 grams. A medium banana, often assumed to be one of the sweetest fruits, actually lands in the middle at 14 grams.
These numbers don’t mean you should avoid these fruits. They’re still packed with fiber, vitamins, and protective plant compounds that processed sweets don’t offer. But if you’re watching your sugar intake, portion size matters more with these varieties than with lower-sugar options.
Fruits With the Least Sugar
Berries are consistently among the lowest-sugar fruits you can eat. A full cup of raspberries has just over 5 grams of sugar. Strawberries and blackberries each come in around 7 grams per cup. Kiwis are surprisingly low too, at about 6.7 grams per fruit.
Lemons and limes barely register, with roughly 1 to 2 grams per fruit, though you’re unlikely to eat them on their own. Avocados, technically a fruit, contain about 1 gram of sugar total. Grapefruit sits at around 10.6 grams for half a fruit, and a cup of diced watermelon (as opposed to a large wedge) stays under 10 grams. If you want to eat fruit freely without thinking much about sugar, berries are your best bet.
What Kind of Sugar Is in Fruit
Fruit sugar is primarily a mix of three types: fructose, glucose, and sucrose. The ratio varies by fruit. Strawberries, for example, contain roughly equal parts fructose and glucose (about 2 to 3 grams each per 100 grams) with almost no sucrose. Cherries follow a similar pattern. Most fruits lean heavier on fructose and glucose, with sucrose playing a smaller role.
This matters because a large meta-analysis published in JAMA Network Open found that the health risks commonly associated with fructose depend heavily on its source. Sugar-sweetened beverages are linked to metabolic problems, but whole fruits are not. In fact, whole fruits showed protective effects, likely because of the other nutrients and plant compounds bundled with the sugar.
Why Fiber Changes Everything
The fiber in whole fruit is the main reason its sugar behaves differently in your body than the same amount of sugar from a candy bar or glass of juice. Soluble fiber thickens the mixture of food in your gut, which slows down gastric emptying and delays how quickly glucose reaches your bloodstream. It also slows the interaction between digestive enzymes and nutrients, meaning sugar gets broken down and absorbed more gradually.
There’s a hormonal effect too. When fiber pushes nutrients further along in your intestine than they’d normally travel, it triggers the release of hormones that improve insulin production, increase insulin sensitivity, and reduce appetite. Fiber also gets fermented by gut bacteria into short-chain fatty acids, which trigger additional hormone signals that further moderate your blood sugar response. This is why eating an orange and drinking orange juice are not nutritionally equivalent, even if the sugar content looks similar on paper.
Juice vs. Whole Fruit
An 8-ounce glass of fruit juice contains about 30 grams of sugar on average, roughly the same as a glass of cola. Commercial juicing removes the skin and pulp, stripping away the fiber that would otherwise slow sugar absorption. You also lose the physical volume that makes whole fruit filling. It’s easy to drink the juice of three or four oranges in a sitting, but eating three or four whole oranges is a different experience entirely.
If you enjoy juice, treating it as an occasional drink rather than a hydration staple keeps your sugar intake in check. A third to half a cup of fruit juice contains about 15 grams of carbohydrate, the same as a small piece of whole fruit.
Dried Fruit Concentrates the Sugar
Drying fruit removes water but keeps all the sugar, which means the sugar density per bite increases significantly. The difference shows up clearly in glycemic load, a measure of how much a food actually raises your blood sugar. Per 100 grams, fresh red grapes have a glycemic load of 8. Raisins (dried grapes) jump to 51. Fresh apricots have a glycemic load of 4, while dried apricots reach 21.
Just two tablespoons of raisins or dried cherries contain about 15 grams of carbohydrate. That’s the same as a small piece of whole fruit, packed into a few bites. Dried fruit isn’t unhealthy, but the portion sizes that feel reasonable are much smaller than with fresh fruit.
Ripeness Changes Sugar Content
The sugar in fruit isn’t fixed. It changes as the fruit ripens. Bananas are the clearest example: as they go from green to yellow, starch converts into sugar. Unripe bananas have about 9.3 grams more starch per 100 grams than slightly ripe ones, and that starch gets replaced by fructose and glucose. The jump from unripe to slightly ripe accounts for roughly 5 grams more sugar per 100 grams. Once a banana reaches the ripe stage, sugar levels plateau and don’t increase much further even as it turns brown and spotty.
Interestingly, unripe bananas contain significantly more dietary fiber, with a drop of about 14 grams per 100 grams between the unripe and slightly ripe stages. So a greener banana gives you more fiber, more resistant starch, and less sugar, while a ripe banana is sweeter but digests faster.
How Glycemic Index Varies by Fruit
Not all fruit sugars hit your bloodstream at the same speed. The glycemic index (GI) ranks foods on a scale from 0 to 100 based on how quickly they raise blood glucose. Watermelon has a GI of 76, which is considered high. Bananas land at 51, in the medium range. Apples come in at just 36, which is low.
High-GI fruits aren’t necessarily bad choices. Watermelon has a high GI but a low glycemic load because it’s mostly water by weight, so a normal serving doesn’t deliver that much total sugar. GI is most useful as a relative guide: if you’re choosing between fruits and want a slower blood sugar response, apples and berries will outperform watermelon and ripe bananas.
Practical Portions
A standard fruit serving is one small piece of whole fruit or about half a cup of cut fruit. For berries and melons, a serving runs three-quarters to one full cup because they’re less sugar-dense. These portions each deliver roughly 15 grams of carbohydrate.
If you’re managing blood sugar, pairing fruit with a source of protein or fat (a handful of nuts, some yogurt) can further slow digestion and blunt the glucose spike. Choosing whole fruit over juice, fresh over dried, and berries over tropical fruits when possible gives you the most fruit for the least sugar impact.