How Many Calories in Watermelon? Hydrating & Low-Cal
Watermelon has just 30 calories per 100g and 46 per cup — one of the most hydrating, low-calorie fruits you can eat. Full nutrition breakdown inside.
Frequently Asked Questions
How many calories are in a cup of watermelon?
One cup of diced watermelon (about 152g) contains roughly 46 calories, 11.5g of carbs, 9.4g of sugar, and 0.6g of fiber. It is over 91% water, making it one of the most hydrating snacks available.
Is watermelon good for weight loss?
Yes. Watermelon is low in calories (30 kcal per 100g), high in water content (92%), and has a low glycemic load despite a moderately high glycemic index. Its high water and fiber content promote satiety, and a clinical study found that daily watermelon consumption reduced body weight, BMI, and waist circumference compared to low-fat cookies.
Does watermelon raise blood sugar?
Watermelon has a high glycemic index (72), but its glycemic load per standard serving is low (4–8) because each serving contains very little net carbohydrate. For most people, a 1-cup portion has a moderate real-world effect on blood sugar, especially when eaten with protein or fat.
How many carbs are in watermelon?
Watermelon contains about 7.6g of carbs per 100g, with 6.2g coming from natural sugars and only 0.4g from fiber. A standard 1-cup serving has about 11.5g of carbs total.
Is watermelon high in sugar?
Watermelon contains 6.2g of natural sugar per 100g — moderate for a fruit. Because the fruit is 92% water, the sugar is diluted across a large serving volume, so the actual sugar load in a typical portion is much lower than it sounds.