BMI or Body Mass Index is utilised to determine whether you are within a healthy weight for your height. The higher the number the increased amount of fat someone has. Use the Perth Weight Loss and Surgery BMI Calculator to find out your BMI.

It is also useful to take into consideration your waist circumference, as the waist measurement helps to assist the risk of health problems by measuring the amount of fat carried around the middle of the body.

BMI compares your weight to height and is calculated by dividing your weight (in kg) by your height (in metres squared).

This calculation will provide an indication of whether you are underweight, a healthy weight, overweight, or obese for your height.

  • Underweight: BMI is less than 18.5
  • Normal weight: BMI is 18.5 to 24.9
  • Overweight: BMI is 25 to 29.9
  • Obese: BMI is 30 or more

If you have a BMI over 30 or 35 you are at risk of:

  • Type 2 Diabetes
  • Stroke
  • Heart disease
  • Venous Stasis Disease
  • Soft Tissue Infections
  • Reflux disease
  • Polycystic Ovarian Disease (PCOS)
  • Sleep Apnoea
  • High Blood Pressure
  • High Cholesterol
  • Arthritis
  • Risk throughout pregnancy