Calories in Watermelon

46kcal per 1 cup, diced (152 g)

30 kcal per 100 g · about 2% of a 2,000-kcal day

Watermelon is over 90% water, which is why a whole cup of it costs fewer than 50 calories. One of the best volume foods in summer.

Watermelon nutrition facts

NutrientPer 100 gPer 1 cup, diced
Calories30 kcal46 kcal
Protein0.6 g0.9 g
Carbs7.6 g11.6 g
Fat0.2 g0.3 g
Fiber0.4 g0.6 g
Sugar6.2 g9.4 g

Where the calories come from

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Values based on USDA FoodData Central reference entries. Actual nutrition varies with variety, preparation, and portion. © 2026 NibbleCal.