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How to Calculate Your BMI (Imperial)

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The body mass index (BMI) can help you establish if you are at a healthy weight for your height. A few household items and some simple calculations are all you’ll need to find your BMI.
What you'll need: 
A bathroom scale
A tape measure
A calculator
A pencil
Using a bathroom scale, determine your weight in pounds and note this on a sheet of paper.
Multiply your weight by 703.
Measure your height with a tape measure and write down this figure in inches.
Multiply this number by itself (height x height).
Divide the first number (weight x 703) by the square of your height to find your body mass index.
The following categories will help you gauge whether you are at a normal, healthy weight: A BMI less than 16.5 indicates that you are severely underweight. A BMI between 16.5 and 18.4 indicates that you are underweight. A BMI between 18.5 and 24.9 indicates that you are in the normal range. A BMI between 25 and 29.9 indicates that you are overweight. A BMI greater than 30 indicates that you are obese. A BMI greater than 40 indicates that you are morbidly obese.
Remember that the BMI, although a useful tool, is not an exact science.
A person’s BMI does not account for muscle mass so, if you are of a muscular build, your BMI may indicate that you are overweight when, in fact, you may be at a normal weight.
When calculating a child’s body mass index, bear in mind that it is not weighed against the categories listed above but is instead compared with the BMIs of children of the same gender and age.


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