How Many Calories Are in 20 Hazelnuts? A Nutritional Breakdown
                                
                                
                                •
                                
                                
                        
                                    
                                    4 min read                                
                            
                                According to USDA data, a standard one-ounce serving, which is approximately 21 whole hazelnuts, contains about 178 calories. Understanding how many calories are in 20 hazelnuts is essential for effective portion control and fitting this nutrient-dense snack into a balanced diet without overindulging.