Body mass index (BMI) and waist circumference
Learn how to calculate your body mass index (BMI) and measure your waist circumference. These measurements tell you if you are a healthy weight.
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BMI calculator
Do you know how being overweight can affect your wellbeing? Estimate whether your weight is healthy by using the healthdirect BMI calculator to work out your BMI.
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What to do if you are underweight
Being underweight could lead to health problems such as a weak immune system and bone fractures. Discover the causes, symptoms and when to get help.
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Obesity
Obesity is a term used to describe being overweight. Obesity can lead to symptoms that affect your life. Learn about BMI, prevention and treatment options.
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Obesity in children
Childhood obesity is when a child has too much body fat for their age. There are simple steps to take to help your child move towards a healthy weight.
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How to reduce visceral body fat (hidden fat)
Visceral or 'toxic’ fat is the harmful fat around your heart and abdominal organs. Learn how to tell if you have visceral fat and how to manage it.
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Lap band surgery
Lap band, also called gastric banding, is a type of weight loss that helps you to feel full after eating only a small amount of food.
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Guide to bariatric surgery
Bariatric surgery is the most effective way to lose weight and keep it off long-term. Learn about the different types of bariatric surgery.
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Gastric bypass surgery
Gastric bypass surgery helps you lose weight by changing how your stomach and small intestine absorb food. It is usually very effective.
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Gastric sleeve surgery
Gastric sleeve surgery involves the removal of a large part of your stomach. It helps you to feel full after eating only a small amount of food.
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