Body Mass Index or “BMI” is a ratio of a person’s weight and height.  This tool can be used to get a number, which correlates with the amount of body fat in an individual.  The number given can help determine if an individual is underweight, healthy, overweight, or obese. 

To calculate BMI:
Take your weight (in pounds), divide it by your height (in inches) squared; and multiply the number by 703. 

BMI = Weight (pounds) ÷ [Height (inches)]^2 × 703

  < 20 = Underweight (increased chance of health risk as number decreases)
20-25 = Healthy Weight
25-30 = Overweight (low risk)
   >30 = Obese (higher chance of health risk as number increases) 

Note: There are some limitations to these numbers.  Although BMI correlates with an individual’s amount of body fat, BMI does not directly measure body fat.  For example an individual with a muscular build may have a higher BMI (>25), but still be in the healthy range. The numbers do, however, give you a baseline and something to work on.  Have a great day, and strive to be healthy in all aspects of life.
                                                                                    Source: Dr. Lees’ Nutrition Lecture Notes 
 If you prefer to steer clear of Mathematical formulas, however, you can also use this chart!
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