Body Mass Index (BMI) for Adults



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Body Mass Index

Body Mass Index (BMI) is a number calculated from a person’s weight and height. BMI is a reliable indicator of body fat for most people. BMI does not measure body fat directly, but research has shown that BMI correlates to direct measures of body fat, such as underwater weighing and dual energy x-ray absorptiometry (DXA). BMI can be considered an alternative for direct measures of body fat and is an inexpensive and easy-to-perform method of screening for weight categories that may lead to health problems.


BMI =   Weight (lbs) x 703
Height (in) x Height (in)


BMI =   Weight (kg)
( Height (cm) x Height (cm) )


The following table is an interpretation of BMI for adults. To measure your BMI, please enter your weight and height and click the Calculate button.


Body Mass Index (BMI) for Adults (non-Asian)


Underweight Normal Overweight Obese
< 18.5 18.5 – 24.9 25.0 – 29.9 ≥ 30


Body Mass Index (BMI) for Asian Adults


Underweight Normal Overweight Obese
< 18.5 18.5 – 23.0 23.1-27.5 ≥ 27.5


Reference: World Health Organization