How many ounces is the size of a fist?
                                
                                
                                •
                                
                                
                        
                                    
                                    4 min read                                
                            
                                Many health sources suggest that a clenched fist can be used as a visual guide. This is because a closed fist is roughly equal to one cup, or 8 fluid ounces of food. This is a simple method to help estimate food quantities.