BMI Calculator

Body mass index, or BMI, is used to determine whether you are in a healthy weight range for your height.

It is useful to consider BMI alongside waist circumference, as waist measurement helps to assess risk by measuring the amount of fat carried around your middle.  

Body mass index (BMI)

  • Height

  • Weight

Calculate your BMI
BMI Calculator-logo

BMI is a useful measurement for most people over 18 years old. But it is only an estimate and it doesn’t take into account age, ethnicity, gender and body composition. We recommend you also check your waist measurement and other risk factors.

Speak to your doctor, an Accredited Practising Dietitian or a health practitioner about your weight.

This calculator shouldn’t be used for pregnant women or children.

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BMI Calculator-Qantas Assure

What’s BMI?

BMI compares your weight to your height, and is calculated by dividing your weight (in kilograms) by your height (in metres squared). It gives you an idea of whether you’re 'underweight', a 'healthy' weight, 'overweight', or 'obese' for your height. BMI is one type of tool to help health professionals assess the risk for chronic disease. Another important tool is waist circumference. It is also important to understand your other risk factors.

Waist measurement

Waist circumference is a simple check to tell if you are carrying excess body fat around your middle.

Where your fat is on your body can be an important sign of your risk of developing ongoing health problems. Carrying excess body fat around your middle is more of a health risk than if weight is on your hips and thighs.

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