Am I a Candidate for Weight Loss Surgery?

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BMI Calculator

It is important that we know your Body Mass Index when you call us. So it is a good idea to use our convenient online calculator. BMI is only one component of your assessment. But with your BMI, we can start the right conversation.


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BMI Results and What They Mean

A healthy BMI range for most healthy adults is between 18.5 and 25.
 A BMI below 18 is underweight while a BMI over 30 is overweight 
or obese.

Less Than 18.5 – Underweight

Depending how underweight you are, you may need to put on some weight for the sake of your health. Your doctor or dietician will advise how to gain weight to ensure you are in a healthy weight range.

18.5 to 25 – Normal Weight

This is the ideal BMI to show that you’re in a healthy weight range. If you are within this weight range, you significantly reduce the chance of developing serious 
health problems.

25 to 30 – Overweight

You may be advised to lose weight to improve your health within this BMI range. Being overweight can negatively impact your overall health.

30 to 40+ – Obese

You’re at great risk of developing serious health problems if you are obese. A BMI over 30 shows that you are heavily overweight, and your doctor or dietician will strongly encourage you to take steps to lose weight.

Why BMI Matters

Being overweight can lead to a number of health conditions such as high cholesterol, high blood pressure, osteoarthritis, gallstones, decreased fertility and sleep apnoea.

Being overweight also significantly increases the chances of developing more serious health problems such as type 2 diabetes, heart disease, stroke and common cancers. By measuring your body fat, you can have a better idea of your current weight and ultimately get a good indication of your overall health.

BMI is Not Right for Everyone

Using a BMI calculator is not the best measurement of weight for everyone.

Athletes should not use the BMI method of weight measurement because they have higher amounts of muscle mass than an average person, and BMI is unable to differentiate between muscle and fat.

Pregnant or lactating women will also show an inaccurate BMI reading.
Children and young people under the age of 18 are also not recommended to use the Body Mass Index because they are still growing.

BMI Pros and Cons

Not everyone agrees that BMI is the best method for weight measurement. Here are the pros and cons to give you a better idea of what you can expect from a BMI weight measurement.

  • Most popular weight measurement tool
  • Easy to calculate
  • Results are consistent and reputable
  • Correlates with other independent body fatness measurements
  • Does not represent body composition or fitness level
  • Does not consider where fat is located
  • Does not differentiate between fat and muscle mass
  • Not suitable for athletes, pregnant women or children

Other Forms of Weight Measurement

BMI is a necessary tool used to identify if a patient is an appropriate candidate for weight loss surgery. BMI also plays a significant role in helping to determine the type of surgery recommended for a patient.


To be eligible for weight loss surgery, a patient needs to have:

  • A BMI of at least 40, or;
  • A BMI of over 35 and suffering from at least one serious health concern related to obesity
  • A BMI of 32 and suffering from at least one chronic pain that affects quality of life


Enter your details into our BMI Calculator to see if you fall under this category. If you think you fit the specifications and wish to explore weight loss surgery options with us at Weight & Metabolic Solutions Australia, contact us today.

Get started on your journey today

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