Grapes top the list of common fresh fruits in sugar content, packing about 17.3 grams of sugar per 100 grams. A standard 3/4-cup serving of grapes contains roughly 20 grams of sugar, which is about five teaspoons’ worth. But the full picture depends on whether you’re comparing fresh fruits gram-for-gram, by typical serving size, or including dried varieties, where the numbers jump dramatically.
Fresh Fruits Ranked by Sugar Content
When you compare fresh fruits weight-for-weight (per 100 grams), tropical and vine fruits dominate the top of the list:
- Black grapes: 17.3 g
- Lychee: 15.2 g
- Banana: 12.2 g
- Pineapple: 11.4 g
- Mango: 11.1 g
- Blueberries: 9.4 g
- Orange: 8.6 g
- Peach: 8.4 g
- Cantaloupe: 7.9 g
- Watermelon: 6.2 g
Grapes have nearly three times the sugar density of watermelon. Lychees, which many people eat by the handful, are close behind. What surprises most people is that bananas, often singled out as “too sugary,” sit in the middle of the pack rather than at the top.
Serving Size Changes the Picture
Per-100-gram rankings are useful for comparison, but nobody eats exactly 100 grams of every fruit. When you look at how much sugar lands in a typical serving, the order shifts. According to FDA reference portions, grapes and watermelon are tied at 20 grams of sugar per serving, but that’s because a standard watermelon portion (2 cups of diced pieces, about 280 grams) is more than double the weight of a grape serving. You’re eating a lot more watermelon to hit the same sugar number.
Here’s how common fruits compare by the portion you’d actually eat:
- Grapes (3/4 cup): 20 g sugar
- Watermelon (2 cups diced): 20 g
- Banana (1 medium): 19 g
- Pear (1 medium): 16 g
- Sweet cherries (1 cup): 16 g
- Plums (2 medium): 16 g
- Orange (1 medium): 14 g
- Peach (1 medium): 13 g
- Kiwi (2 medium): 13 g
- Apple (1 large): 11 g
- Cantaloupe (1/4 melon): 11 g
- Strawberries (8 medium): 8 g
If you’re someone who easily finishes a large bowl of grapes or a big wedge of watermelon in one sitting, your actual intake could be well above 20 grams. Grapes are particularly easy to overeat because they’re small and snackable.
Dried Fruit Is in a Different League
Drying fruit removes water but leaves all the sugar behind, concentrating it into a much smaller package. The result is a dramatically higher sugar density by weight. Dates are about 64 to 66 percent sugar. Raisins (dried grapes) are about 59 percent sugar. Dried apricots clock in at 53 percent, dried figs at 48 percent, and prunes at 38 percent.
To put that in perspective, 100 grams of fresh grapes gives you 17.3 grams of sugar, while 100 grams of raisins delivers roughly 59 grams. That’s more than triple the sugar in the same weight. It’s easy to eat 100 grams of raisins without thinking about it, but that’s the sugar equivalent of eating about 340 grams of fresh grapes. If you’re watching sugar intake for any reason, dried fruit is the category that deserves the most attention.
Why Some Sugary Fruits Affect You More
Not all fruit sugar hits your bloodstream at the same speed. The glycemic index (GI) measures how quickly a food raises blood sugar on a scale from 0 to 100. Dried dates have a GI of 62, and mangoes are close behind at 60. Both cause a relatively fast blood sugar rise. Grapes, despite having more total sugar than mangoes, have a GI of only 45, meaning their sugar enters your bloodstream more gradually. Cherries sit even lower at 20.
Fiber is the main reason for these differences. Fiber slows digestion and blunts the blood sugar spike from the sugar you’re eating alongside it. A medium banana has about 3 grams of fiber, and a medium orange has the same. Raspberries are the fiber standout at 8 grams per cup, which helps explain why berries tend to have a gentler effect on blood sugar despite containing some sugar of their own. Fruits that are high in sugar but low in fiber, like grapes and lychees, produce a faster blood sugar response.
This is also why whole fruit behaves differently from fruit juice. The World Health Organization classifies fruit juices and fruit juice concentrates as “free sugars,” the same category as added sugars, and recommends keeping free sugar intake below 10 percent of your total daily calories. Whole fruit, with its fiber and intact cell structure, does not fall into that category.
Lowest-Sugar Fruits for Comparison
If you want fruit with minimal sugar, a few options are strikingly low. An entire avocado has about 1 gram of sugar. A lime has roughly 1.1 grams, and a lemon about 2.1 grams. Among fruits you’d eat as a snack, raspberries are the best bet at just over 5 grams per cup, and a single kiwi has about 6.7 grams. Strawberries are another solid choice at 8 grams for eight medium berries.
For context, the gap between the highest and lowest common fruits is substantial. A serving of grapes has 20 grams of sugar while a cup of raspberries has about 5 grams. Swapping between these changes your sugar intake by roughly 15 grams, or close to four teaspoons, per serving. Over the course of a day where you eat fruit two or three times, those choices add up.