How many cubes of watermelon is a serving? A guide to proper portion sizes
                                
                                
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                                    3 min read                                
                            
                                According to the USDA, one standard serving of watermelon is equivalent to one cup of diced fruit. This key measurement helps answer the question of how many cubes of watermelon is a serving and provides the basis for understanding proper portion sizes for this popular, hydrating treat.