Watermelon calories, from a cup to the whole melon
46 calories in a cup of diced watermelon
A cup of diced watermelon has 46 calories. It weighs 152 g.
A cup of melon balls comes out almost the same, 154 g and 46 calories. Half a cup of diced watermelon is 23 calories.
USDA FoodData Central. Watermelon, raw. Source checked September 29, 2026.
Balls, wedges and the whole melon
The whole melon USDA measured is 15 inches long and weighs 4,518 g, which comes to 1,355 calories.
10 melon balls are 122 g and 37 calories.
| Portion | Weight | Calories kcal | Protein g | Carbs g | Fat g | Fiber g | Sugar g | Sodium mg | Caffeine mg | Portion source |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 cup diced watermelon | 152 g | 46 | 0.9 | 11.5 | 0.2 | 0.6 | 9.4 | 1.5 | 0 | USDA portion, 1 cup, diced |
| Half a cup diced watermelon | 76 g | 23 | 0.5 | 5.7 | 0.1 | 0.3 | 4.7 | 0.8 | 0 | Half a cup, computed from USDA's 1 cup, diced |
| 1 cup watermelon balls | 154 g | 46 | 0.9 | 11.6 | 0.2 | 0.6 | 9.5 | 1.5 | 0 | USDA portion, 1 cup, balls |
| 10 watermelon balls | 122 g | 37 | 0.7 | 9.2 | 0.2 | 0.5 | 7.6 | 1.2 | 0 | USDA portion, 10 watermelon balls |
| 1 wedge of watermelon | 286 g | 86 | 1.7 | 21.6 | 0.4 | 1.1 | 17.7 | 2.9 | 0 | USDA portion, 1 wedge, about 1/16 of a melon |
| 1 whole watermelon | 4518 g | 1355 | 27.6 | 341.1 | 6.8 | 18.1 | 280.1 | 45.2 | 0 | USDA portion, 1 melon, 15 inches long by 7 1/2 inches across |
USDA FoodData Central. Watermelon, raw. Source checked September 29, 2026.
Carbs, fiber and protein in a cup
A cup of diced watermelon has 11.5 g of carbs, 0.6 g of fiber and 0.9 g of protein.
The table below is for 1 cup of diced watermelon.
For the rest of a summer fruit spread, see apples, bananas, oranges and avocado, or browse every calorie reference.
| Nutrient | 1 cup diced watermelon | Per 100 g |
|---|---|---|
| Calories | 46 kcal | 30 kcal |
| Protein | 0.9 g | 0.6 g |
| Carbs | 11.5 g | 7.5 g |
| Fat | 0.2 g | 0.1 g |
| Fiber | 0.6 g | 0.4 g |
| Sugar | 9.4 g | 6.2 g |
| Sodium | 1.5 mg | 1 mg |
USDA FoodData Central. Watermelon, raw. Source checked September 29, 2026.
Weigh the cut melon in your bowl
Put your bowl on a scale, add the pieces and enter the grams below. The calculator uses 30 calories per 100 g.
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152 g has about 45.6 calories.
USDA FoodData Central. Watermelon, raw. Source checked September 29, 2026.
How many calories are in a wedge of watermelon?
USDA's wedge is about a sixteenth of a melon, 286 g and 86 calories. It doesn't list a slice, so the wedge is the closest measure.
USDA FoodData Central. Watermelon, raw. Source checked September 29, 2026.
How much sugar does a cup of watermelon have?
A cup of diced watermelon has 9.4 g of sugar, or 6.2 g per 100 g.
USDA FoodData Central. Watermelon, raw. Source checked September 29, 2026.
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USDA FoodData Central. Watermelon, raw. Source checked September 29, 2026.