Watermelon is a very low-calorie treat that can be incorporated into your diet. In just u003ca href=u0022https://fdc.nal.usda.gov/fdc-app.html#/food-details/167765/nutrientsu0022 target=u0022_blanku0022 rel=u0022noreferrer noopeneru0022u003e100 gramsu003c/au003e, there are 30 calories. The nutrients in watermelon are enough to satisfy your daily recommended intake of fruit.