Can Diabetics Eat Watermelon?
Fits a 45 g meal
11.5g carbohydrate per 1 cup diced (152 g)
One serving is 26% of a 45 g carbohydrate budget.
11.5 g of carbohydrate per serving against a 45 g per-meal budget — 26% of the meal. We call it a fit at a third of the budget or less, tight up to two thirds, and over above that.
Why
Watermelon is 92% water. The glycaemic index is high, but a cup only carries 11 g of carbohydrate to act on.
Watermelon has a bad reputation among people managing blood glucose, and it comes from a real number applied wrongly. Its glycaemic index is around 72 — high. But glycaemic index measures the effect of a fixed 50 g of carbohydrate, and you would need roughly four and a half cups of watermelon to get there. Glycaemic load, which accounts for the portion you actually eat, is low. A cup with a source of protein or fat alongside behaves very differently from a cup on an empty stomach.
| Serving | 1 cup diced (152 g) |
|---|---|
| Total carbohydrate | 11.5 g |
| Fibre | 0.6 g |
| Sugars | 9.4 g |
| Energy | 46 kcal |
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Common questions
- Does watermelon spike blood sugar?
- A large portion eaten alone can. A cup-sized portion, especially alongside protein or fat, carries only about 11 g of carbohydrate.
- How much watermelon can a diabetic eat?
- That depends on your per-meal carbohydrate budget, which is what this page's control is for. There is no single number, and your care team's figure beats any website's.
- Is watermelon worse than other fruit?
- Per cup it is one of the lower-carbohydrate fruits, precisely because it is mostly water. Grapes and bananas carry two to three times as much per cup.
Figures are USDA FoodData Central standard reference values for the generic food, not a specific brand. A branded version can differ, sometimes considerably.