BMI Calculator

Check your BMI

NBC BMI Calculator New*
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Your BMI is within the Underweight category.

Your BMI is within the Underweight category.

Your BMI is within the Normal weight category.

Your BMI is within the Normal weight category.

Your BMI is within the Pre-obesity category.
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Your BMI is within the Pre-obesity category.
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Your BMI is within the Obesity class I category.
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Your BMI is within the Obesity class I category.
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Your BMI is within the Obesity class II category.
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Your BMI is within the Obesity class II category.
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Your BMI is within the Obesity class III category.
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Your BMI is within the Obesity class III category.
Please enter your name and email below so we can send your results, including how much weight you need to lose to achieve a healthy BMI.

What is BMI?

BMI is a measurement of a person’s leanness or corpulence based on their height and weight, and is intended to quantify tissue mass. It is widely used as a general indicator of whether a person has a healthy body weight for their height. Specifically, the value obtained from the calculation of BMI is used to categorize whether a person is underweight, normal weight, overweight, or obese depending on what range the value falls between.

The calculation of BMI can be used for males and non-pregnant females between the ages of 18 and 65. Although BMI is calculated for children in exactly the same way as for adults, the results are used in an entirely different way and for that reason a standard BMI calculator should not be used for those under the age of 18

BMI calculations are also unsuitable for those who have developed significant amounts of muscle mass through physical exercise, as the results will tend to indicate higher levels of body fat than is actually the case.

BMI does not directly measure body fat. BMI is a proxy measure of body fat based on the variables of weight and height, and as such it provides an estimation only. Because BMI does not provide a direct measure of body fat, its use is confined to certain people. For example, it should not be used for pregnant females, for people under the age of 18 or over the age of 65, or for those who have developed significant muscle mass through physical activity.

Yes, gender is a factor in BMI, even though the World Health Organisation (for simplicity) uses the same BMI categories and ranges for both males and females. However, it is well documented that women tend to carry higher levels of stored fat than men1,2. For women with a BMI in the healthy weight range, fat comprises around 15% to 20% of total body weight, whereas the corresponding percentages in men are 10% to 15%. The reason why women tend to carry more fat than men is the biological expectation of pregnancy, and the imperative to nourish the feotus.

We use BMI and Waist Circumference

to select the procedure that's right for you

Waist Circumference

Another way to estimate your potential disease risk is to measure your waist circumference. Excessive abdominal fat may be serious because it places you at greater risk for developing obesity-related conditions, such as Type 2 Diabetes, high blood pressure, and coronary artery disease. Your waistline may be telling you that you have a higher risk of developing obesity-related conditions if you are1:

  • A man whose waist circumference is more than 40 inches
  • A non-pregnant woman whose waist circumference is more than 35 inches

How to measure your Waist circumference

To correctly measure waist circumference: - Stand and place a tape measure around your middle, just above your hipbones . Make sure tape is horizontal around the waist Keep the tape snug around the waist, but not compressing the skin. Measure your waist just after you breathe out.

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