Cantaloupe is a relatively low-sugar fruit. One cup of cubed cantaloupe contains about 13 grams of sugar, which is less than a medium banana (14 grams), a large apple (19 grams), or three-quarters of a cup of grapes (20 grams). If you’re watching your sugar intake, cantaloupe is one of the better fruit choices you can make.
Sugar Content by Serving Size
How much sugar you get depends entirely on how much cantaloupe you eat, and serving sizes vary quite a bit. A single wedge (one-eighth of a medium melon) has only about 5.4 grams of sugar. A cup of cubed cantaloupe, which is roughly 160 grams, has 12.6 grams of sugar and just 54 calories. A quarter of a medium melon, a common portion listed on FDA nutrition references, has about 11 grams.
For context, a 12-ounce can of cola has about 39 grams of sugar. You’d need to eat roughly three cups of cantaloupe to match that. Cantaloupe also has very little fat (0.3 grams per cup) and a modest 13 grams of total carbohydrates, making it one of the lighter fruits you can snack on.
How Cantaloupe Compares to Other Fruits
Cantaloupe sits in the lower half of common fruits when ranked by sugar per serving. Here’s how it stacks up, using typical portions from the FDA:
- Strawberries (8 medium): 8 grams of sugar
- Cantaloupe (1/4 medium melon): 11 grams
- Banana (1 medium): 14 grams
- Apple (1 large): 19 grams
- Grapes (3/4 cup): 20 grams
Berries tend to be the lowest-sugar fruits overall, but cantaloupe comes in comfortably below bananas, apples, and grapes. It also has a volume advantage: because cantaloupe is about 90% water, you get a physically larger, more filling portion for fewer grams of sugar than denser fruits.
Why Cantaloupe Doesn’t Spike Blood Sugar
Raw sugar grams don’t tell the whole story. What matters more is how quickly that sugar hits your bloodstream, and cantaloupe performs well here too. It has a glycemic index of 54, which is moderate (anything under 55 is considered low-GI). More importantly, its glycemic load, which accounts for how much sugar is in a realistic serving, is just 4. That’s very low. A glycemic load under 10 is considered unlikely to cause meaningful blood sugar spikes.
The reason for this gap between glycemic index and glycemic load is cantaloupe’s high water content. The fruit is so water-dense that a normal serving simply doesn’t contain enough carbohydrate to move your blood sugar much. The 1.4 grams of fiber per cup also slows digestion slightly, giving your body more time to process the sugar gradually rather than all at once.
The sugar in cantaloupe is a mix of three types: sucrose makes up the largest share at about 4.35 grams per 100 grams, followed by fructose (1.87 grams) and glucose (1.54 grams). This blend is typical of melons and digests at a moderate pace.
Cantaloupe and Diabetes
If you have diabetes, cantaloupe is generally a safe fruit choice. The Mayo Clinic lists one cup of cubed cantaloupe as a standard fruit serving containing about 15 grams of carbohydrates, the same amount found in half a medium apple or three-quarters of a cup of blueberries. Because cantaloupe is lower in carbs by weight, you can eat a larger physical portion while staying within the same carbohydrate budget as denser fruits.
Dietitians at the Cleveland Clinic note that cantaloupe’s combination of fiber and water content helps reduce the chance of blood sugar spikes for most people living with diabetes. Pairing it with a small amount of protein or fat (a few slices of prosciutto, a handful of nuts) can slow absorption even further.
What Else You Get With That Sugar
The sugar in cantaloupe comes packaged with significant nutrition. A single cup delivers 65% of your daily vitamin C and 30% of your daily vitamin A, mostly from beta-carotene. Cantaloupe actually contains at least as much beta-carotene as carrots, which is unusual for a fruit. You also get 427 milligrams of potassium per cup, about 10% of your daily value, an amount comparable to what you’d find in a small banana.
That 90% water content also makes cantaloupe one of the most hydrating foods you can eat. It contains natural electrolytes that help your body absorb and retain that water, which is why it shows up frequently on lists of foods that help with hydration during hot weather or after exercise. At 54 calories per cup, it’s hard to find a more nutrient-dense way to satisfy a sweet craving.