How many kJ of energy do you need a day to survive?
                                
                                
                                •
                                
                                
                        
                                    
                                    5 min read                                
                            
                                On average, a sedentary adult needs roughly 8700 kJ per day to maintain basic bodily functions and a healthy weight. However, this number is a general guideline, and personal energy requirements are influenced by a wide array of factors, including age, sex, weight, and activity level.