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# How to Accurately Calculate BMI

by
Brian Bowden
Brian Bowden began writing professionally in 2008 for "American Football Monthly" and "Gridiron Strategies." He is accredited by the National Strength and Conditioning Association as a certified strength and conditioning specialist. He holds a Bachelor of Science in exercise and sport science from Pennsylvania State University and a Master of Education in elementary education from Widener University.
A calculator is a must for determining BMI. Photo Credit Calculator image by Alhazm Salemi from <a href='http://www.fotolia.com'>Fotolia.com</a>

BMI stands for body mass index. According to the National Strength and Conditioning Association (NSCA), BMI is the preferred body composition assessment for obese individuals. The association states that the BMI classifications are as follows: less than 18.5 is considered underweight, 18.5 to 24.9 is normal, 25.0 to 29.9 is overweight and 30.0 to 39.9 is thought to be obese, while any BMI greater than 40 is considered extremely obese.

### Step 2

Determine your height in inches. For example, if you are 6 feet, 1 inch, list your height as 73 inches.

### Step 3

Square your height using a calculator. In other words, multiply your height by your height. For example, if your height is 73 inches, your equation looks like this: 73 x 73. Your height squared is 5,329.

### Step 6

Compare your BMI to the table available online by the National Institutes of Health. Using the information given, with a BMI of 32.9, you would be classified as obese.

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