Disclaimer: This calculator provides an estimate based on standard formulas. Individual calorie needs and weight change results can vary significantly due to factors not accounted for here (e.g., body composition, hormones, specific health conditions, genetics, adherence). The weight loss/gain targets are theoretical estimates based on average energy deficits/surpluses and do not guarantee results. Rapid weight changes may not be suitable or sustainable for everyone. Always consult with a qualified healthcare professional or registered dietitian for personalized advice regarding your diet, health, and weight management goals.