Bariatric Macro Calculator
The Bariatric Macro Calculator estimates your personalized daily calorie and macronutrient needs based on your surgery type and current physical stats. This tool helps post-op patients optimize their nutrition for healing and long-term weight management success. Whether you are recovering from gastric bypass, adjusting to a gastric sleeve, or maintaining weight loss, this tool provides a precise plan to meet your specific protein requirements.
Quick Examples
How Daily Nutritional Needs Is Calculated
Your daily nutritional needs represent the specific energy and building blocks your body requires after weight loss surgery. We calculate this using the Mifflin-St Jeor equation to find your Basal Metabolic Rate (BMR), which accounts for your height, weight, age, and gender. This number is then multiplied by an activity factor and adjusted based on your specific procedure. Finally, we apply surgical guidelines to ensure you get enough protein for healing while maintaining a calorie deficit for weight loss.
Men: 88.362 + (13.397 × weight in kg) + (4.799 × height in cm) - (5.677 × age)
Women: 447.593 + (9.247 × weight in kg) + (3.098 × height in cm) - (4.330 × age)
Where:
- BMR is multiplied by an activity factor (1.2–1.9) to find Total Daily Energy Expenditure (TDEE)
- Calories are adjusted for surgery type and time since operation
- Protein is set to a minimum of 60g (women) or 70g (men)
Why This Method?
This method aligns with the American Society for Metabolic and Bariatric Surgery (ASMBS) guidelines to ensure safe and effective weight loss.
What Your Daily Nutritional Needs Means
Your results show the exact amount of fuel and nutrients your body needs to heal and lose weight safely without malnutrition.
How to Use Your Results
- For weight loss: Aim for the lower end of the calorie range while prioritizing protein to protect muscle mass.
- For maintenance: Increase your intake slightly to match your activity level and stabilize your weight.
- Early post-op patients: Focus on hitting the minimum protein target first, even if total calories are low.
This tool provides educational estimates only and is not a substitute for professional medical advice. Always consult your bariatric surgeon or dietitian before starting a new nutrition plan.
Recalculate your needs every 10-15 pounds lost or as your activity level changes to ensure your targets stay accurate.