The macros found in Watermelon are split (approximately) 7% protein, 89% carbs, and 4% fat of total calories.
In g of Watermelon there are 30 Calories, 0.6 grams Protein, 7.6 grams Carbs, and 0.2 grams Fat.
In oz of Watermelon there are 9 Calories, 0.2 grams Protein, 2.1 grams Carbs, and 0.1 grams Fat.
Check out the macronutrient breakdowns of other ingredients, including a list of high protein foods and more in our Macros in Food page, or search the calorie and macro content of another food below.