How Many Calories Are in a Can of Light Tuna?
                                
                                
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                                    4 min read                                
                            
                                According to the USDA, a standard 5-ounce can of light tuna packed in water contains approximately 120 calories. This highly variable figure depends on the liquid it is packed in (water or oil), the amount drained, and the specific tuna species, providing a lean, high-protein component for many diets.