Knowing BMI can help adult men and women understand their overall health. Use the BMI calculator below to determine your body mass index by inputting your height and weight.
Understanding your Body Mass Index
Now that you know your body mass index you are one step closer to mastering your overall health. Find out how to understand your BMI
For most people, the following applies:
- If your BMI is less than 18.5, your BMI is within the underweight category. This may not be good for your health. There are many benefits of being a healthy weight. Visit your health professional to discuss these.
- If your BMI is between 18.5 and 24.9, your BMI is within the healthy weight category. This is generally good for your health. The challenge is to maintain that weight, and not put on weight as you get older. Please read more of the information on this website for tips on how to maintain a healthy weight.
- If your BMI is between 25 and 29.9, your BMI is within the overweight category. This may not be good for your health. There are many benefits of moving towards a healthier weight, and even losing a small amount of weight can deliver major health benefits.
- If your BMI is 30 or over, you are within the obese category. This may not be good for your health. There are many benefits of moving towards a healthy weight and losing even a small amount of weight can bring health benefits. You may also benefit from more supervised guidance; talk with your health professional about how losing weight can improve your health and wellbeing.
Use this simple tool to calculate your body mass index (BMI). BMI is a widely used measure to find out whether you’re a healthy weight for your height.
Why is this important?
Being a healthy weight means not being under or overweight. A BMI of 20-25 is considered healthy for most adults. However, BMI can be an inaccurate measure of healthy weight for pregnant women, children, older people, athletes or very muscular people. It may also need to be adjusted for some ethnic groups, including people of Asian, Aboriginal or Torres Strait Islander descent.
Being underweight may be associated with lack of some vitamins and minerals that can affect important body functions, such as your immune response to infection and fertility or it can lead to a multitude of health issues from heart disease to bone problems.
Being overweight or obese can lead to a multitude of health issues from heart disease, bone and joint problems as well as increase your risk of some cancers, sleep apnoea and type 2 diabetes.
Putting on weight and trying to lose weight can be hard. Don’t be disheartened or de-motivated if progress is slow. It’s important to decide on small, practical changes that you feel comfortable with and that you’ll be able to stick to. It’s helpful to get support from family or friends when you’re trying to change your weight.