The Body mass index, or BMI, is a widely accepted shortcut to determine if you are in the optimal weight for your height. BMI has the advantage of being easy to calculate, but is limited in that different people have different proportions of body fat to muscle mass, which weighs more
Weigh yourself as accurately as possible. Since food or drink in your system can affect your weight, most people prefer to weigh up the first morning. Step on the scale three times to find the best average weight.
Convert your height to inches and squares it. A 5-foot, 7-inch woman is 67-inches high. Take 67 and multiplying it by itself to get the space to 4489.
Share weight in pounds by height squared in total. For a u00A3 155 adult, divide 155 by 4486 to get 0.0346.
Multiply that figure, 0.0346 in the example, with 703 (converting from pounds and inches in kilograms and meters). This number, 24. 29, the BMI index.
Determine your weight range. A BMI below 18.5 is underweight, between 18.5 and 24.9 is the normal range, 25.0 to 29.9 is overweight and over 30 is obese.
Tips and Warnings
BMI should only be used as a screening tool for getting a general idea of your weight range. Before starting a weight loss (or gain) program, you should consult your doctor for further testing and consultation.
While BMI is a good starting point, consider any special circumstances which may affect the index such as more or less muscle mass than the average person.
For adults over 20, is that BMI is not sex specific. Children and teenagers should interpret their results using BMI charts for their gender and age.