With the metric system the formula for bmi is weight in kilograms divided by height in meters squared. Body mass index bmi is a simple index of weight for height that is commonly used to classify underweight overweight and obesity in adults. Weight kg height m 2. 020247 x height m0725 x mass kg0425 where height is in meters and mass is in kg. Therefore to calculate bmi take the weight lbs and divide it by height in. Take the result of that calculation and divide it by height again.
Body mass index calculator. The real reason as someone pointed out is that people dont scale up proportionately. Then multiply that number by 703. For instance the bmi of a person who is 53 and weighs 125 lbs is calculated as follows. It is defined as the weight in kilograms divided by the square of the height in meters 1. Weight kg height cm height cm x 10000 with the metric system the formula for bmi is weight in kilograms divided by height in meters squared.
Weight in pounds lbs divided by height in inches in squared and multiplied by a conversion factor of 703 weight lbs height in 2 x 703. Lets calculate however using pounds and inches. Taller people tend to be slimmer and the proper exponent is actually between 2 and 3. Weight 68 kg height 165 cm 165 m. If a 5 ft tall person weighs 150 lbs then a 6 ft person of the exact same proportions would weigh 259 lbs. The current bmi calculator divides a persons weight by their height to the power of 2 or squared.
Bmi weight kg height 2 according to most criteria accepted around the world. The result is in squared meters which easily be converted to square feet inches or yards as needed. Body mass index or bmi weight in kilograms height in meters² 703 weight in pounds height in inches². To estimate your body surface area our bsa calculator uses the following formula. Bmi is your weight in kilograms over your height squared in centimeters. Because height is commonly measured in centimeters divide height in centimeters by 100 to obtain height in meters.