Weight Loss Surgery Calculator

Weight loss surgery can be a life-changing decision, and understanding the nutritional aspects is crucial for a successful outcome. The Weight Loss Surgery Calculator helps you determine the recommended daily calorie intake to achieve your target weight within a specified time frame.


The calculator uses the formula: Calories Per Day=Total Calories to LoseNumber of WeeksCalories Per Day=Number of WeeksTotal Calories to Lose​

How to Use

  1. Enter your current weight in pounds.
  2. Specify your target weight.
  3. Input the number of weeks in which you want to achieve your target weight.
  4. Provide the daily calories you plan to consume.


Suppose your current weight is 200 lbs, and you aim to reach 180 lbs in 10 weeks, consuming 1500 calories per day. Click “Calculate” to get personalized recommendations.


  1. What is the significance of the 3500 calorie rule? The 3500 calorie rule estimates that a pound of body weight is roughly equivalent to 3500 calories. This rule is commonly used to calculate weight loss.
  2. Can I use this calculator after any type of weight loss surgery? Yes, this calculator can be used for various weight loss surgeries, but always consult with your healthcare provider for personalized advice.
  3. Is it safe to lose weight rapidly? Rapid weight loss may have health risks. Consult with your healthcare team to ensure a safe and effective weight loss plan.
  4. Should I adjust my calorie intake during different phases of weight loss? Yes, your healthcare provider may recommend adjusting your calorie intake based on your progress and specific surgical procedure.
  5. Can I use this calculator for weight gain purposes? No, this calculator is specifically designed for weight loss. Consult with a nutritionist for weight gain recommendations.


The Weight Loss Surgery Calculator is a useful tool to help you plan your nutritional intake after surgery. Remember, individual results may vary, and it’s essential to consult with your healthcare team for personalized advice on your weight loss journey.

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