Body Mass Index - Input


Current weight:

Current height:

- Select One -N/ABodybuilding/AthletePregnantBreastfeedingUnder 18 Years Old



BMI stands for "body mass index," a numerical value of your weight in relation to your height. BMIs are good indicators of healthy weights for adult men and women, regardless of body frame size. Higher BMIs (25+) are associated with increased health risks in some people. Could your weight be increasing your health risks? Use our BMI Calculator to find out.


The BMI ranges used in this calculator derive from the BMI guidelines of the National Heart, Lung, and Blood Institute (NHLBI), in cooperation with the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), of the National Institutes of Health, as published in Clinical Guidelines on the Identification, Evaluation, and Treatment of Overweight and Obesity in Adults, 1998.


var strErrorMsg; function check_weight() { if (document.main.wu.selectedIndex == 0) { if (document.main.w.value < 40 || document.main.w.value > 500) { strErrorMsg += " - Weight: Please enter a value between 40 lbs and 500 lbs. \n"; correct = false; } } else { if (document.main.w.value < 18 || document.main.w.value > 227) { strErrorMsg += " - Weight: Please enter a value between 18 kg and 227 kg. \n"; correct = false; } } } function check_height() { if (document.main.hu1.selectedIndex == 0 && document.main.hu2.selectedIndex == 0) { if ((((document.main.h1.value * 12)+(document.main.h2.value * 1)) < 48) || (((document.main.h1.value * 12) + (document.main.h2.value * 1)) > 84)) { strErrorMsg += " - Height: Please enter a value between 48 inches and 84 inches. \n"; correct = false; } } else { if ((((document.main.h1.value * 100)+(document.main.h2.value * 1)) < 147) || (((document.main.h1.value * 100) + (document.main.h2.value * 1)) > 214)) { strErrorMsg += " - Height: Please enter a value between 147 cm and 214 cm. \n"; correct = false; } } } function submitPage(action) { strErrorMsg = "Please correct the following errors with your submission: \n"; correct = true; check_height(); check_weight(); if (correct == false) { alert(strErrorMsg); } else { document.main.action = action; document.main.submit(); } }

Enter Your Information

The Body Mass Index Calculator can be used as a general gauge of how appropriate your body weight is for your height. By entering your current height and weight, you can assess if you are underweight, overweight, or just right.

The BMI Calculator is based on data taken from middle-aged men and women. It may not be accurate for pregnant or nursing women, competitive athletes, and the elderly. The normal ranges for BMI in children are entirely different, and vary according to age and gender.

If you have used other A.D.A.M. tools, some of this information may be filled in for you.

1. Click the appropriate button to indicate if you are entering your weight in pounds or kilograms.

2. Enter your weight.

3. Click the appropriate button to indicate if you are entering your height in feet and inches or in meters and centimeters.

4. Enter your height.

5. Select your status: NONE, BODYBUILDING/ATHLETE, PREGNANT, BREASTFEEDING, or UNDER 18 years of age.

6. When you're finished, click SUBMIT to display the results.

7. To enter new height and weight measurements, click TRY AGAIN.


Last reviewed 12/31/2010 by David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Previously reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc (6/20/2008).


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