Do Diced Onions Have Calories? A Full Nutritional Breakdown
                                
                                
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                                    4 min read                                
                            
                                According to the USDA, a single cup of raw, chopped onions contains approximately 64 calories, demonstrating that while onions are not calorie-free, they are very low in energy density. The act of dicing an onion does not inherently add calories to the vegetable itself; rather, it changes the volume-to-weight ratio, which is important for accurate portioning and calorie counting.