Calculate your BMI

Your BMI can be a useful starting measure to identify your weight classification and your obesity risk factors.







Weight classification: Obese III

Risk of related disease: Very severe risk of comorbidities

Below 18

your bmi classification


Increased risk of comorbidity

18 - 25

your bmi classification

Normal weight

Low risk of comorbidity

25 - 30

your bmi classification


Increased risk of comorbidity

30 - 35

your bmi classification

Obese I

Moderate risk of comorbidity

35 - 40

your bmi classification

Obese II

Severe risk of comorbidity

40 - 45

your bmi classification

Obese III

Very severe comorbidity risk

For a more complete understanding of your treatment options

BMI is not relevent if you are under 18 or pregnant.

This information is designed to provide you with helpful educational information but is for information purposes only, is not medical advice, and should not be used as an alternative to speaking with your doctor. No representation is made that the information provided is current, complete, or accurate. Medtronic does not assume any responsibility for persons relying on the information provided. Be sure to discuss questions specific to your health and treatments with a healthcare professional. For more information please speak to your healthcare professional.

What are some BMI considerations?

Although the BMI can be a reasonable tool for interpreting a person’s weight category, in some groups, it can be less accurate1. For example:

  • People with more muscle (such as athletes) have a lower proportion of body fat so a higher BMI might be considered acceptable.
  • Women with the same BMI as men will typically have more body fat.
  • People lose lean tissue as they age so older people have more body fat than younger people even if they have the same BMI.
  • People from South Asian, Chinese and Japanese background may have more body fat at lower weights and be at greater risk of ill-health. They may need a BMI threshold of > 23 kg/m2 to be considered overweight.
  • People from Pacific Island backgrounds (including Torres Strait Islander peoples and Maori) often have a higher proportion of lean body mass. They might need a higher BMI threshold to be considered overweight.
  • Many Aboriginal people carry weight around the middle so even modest levels of overweight might be associated with an increased risk of Type 2 diabetes.
1 National Health and Medical Research Council (2013). Clinical practice guidelines for the management of overweight and obesity in adults, adolescents and children in Australia. Available at, accessed September 2019.