Bmi calculator for older women4/17/2024 It is one of the most reliable ways to measure body composition, but scans can be expensive. Dual-energy X-ray absorptiometry (DEXA): DEXA scans use X-rays to provide a detailed breakdown of bone mineral density, lean tissue, and fat mass.Several methods can calculate body composition, including: Conversely, older adults may have lower BMIs due to a loss in muscle mass and bone density while still having higher body fat ratios.īody composition tells a person how much muscle, fat, and other types of tissue they have in their body. It does not consider potential differences in body types for people of different ethnicities and physical abilities.īecause Quetelet did not invent the BMI scale to assess health, this metric also does not consider the influence of muscle mass, bone density, and fat distribution, which can affect the results.Īthletes, for instance, may have overweight on the BMI scale due to their higher muscle mass despite having low body fat. As a result, the BMI scale’s definition of “average” only applies to one demographic. To calculate this average, Quetelet mainly used data from white Europeans. Quetelet wanted to calculate the physical characteristics of the “average man,” which he deemed to be the ideal humans should aim for. Originally, it was not a scale for measuring health. The Belgian mathematician Adolphe Quetelet developed the BMI scale in the early 19th century. The categories are:ĭespite its widespread use, BMI has many limitations and criticisms. The result determines where it falls on a scale. " Healthy Weight," Centers for Disease Control and Prevention.Calculating BMI involves using a mathematical formula: a person’s weight in kilograms (kg) divided by their height in square meters (m): BMI = kg / m 2." Body Mass Index," Wikipedia, The Free Encyclopedia.Calculate normal weight range in US units:.Maximum weight (kg) = 24.9 × height 2 (m) Minimum weight (kg) = 18.5 × height 2 (m) Calculate normal weight range in metric units:.To calculate your normal weight range use the following formulas: If you are concerned about your weight, it is best to consult with your doctor or healthcare professional.įor additional information about the BMI calculation see our BMI is one of several tools used to assess a person's weight and overall health. Keep in mind that BMI is a ratio between height and total body weight - it does not differentiate between weight from muscle and weight from fat, nor does it consider an individual's type of body frame. Children and adolescents are not evaluated using these thresholds but are evaluated relative to other children of the same age and gender.For example, in Singapore and Hong Kong a BMI of 23.0 is considered overweight, whereas in the United States a BMI of 25 is considered overweight. In many Southeast Asian countries, the thresholds for the overweight and obese categories tend to be lower.It is calculated as kg per square meter or pounds per square inch of height.Īlthough BMI is calculated the same way for all ages internationally, the way BMI is interpreted depends on country location and the person's age. The body mass index or BMI is a ratio of mass to height. Then divide weight by total inches squared, and multiply the result by 703.īMI of 26.4 puts Stella in the overweight BMI category. What is her BMI?įind total inches by multiplying 5 * 12 and add 10. Stella weighs 184 lb and is 5 feet, 10 inches tall. Referencing the charts above you can see that aīMI of 17.7 puts Matilda in the underweight BMI category. Matilda weighs 64 kg and is 1.9 meters tall. The US BMI formula is:īMI = weight (lb) ÷ height 2 (inches) * 703 Example BMI Calculation in Metric Units Using US units, where weight is in pounds and height is in inches, divide weight by inches squared. Using metric units, where weight is in kilograms and height is in meters, divide weight by meters squared. Examples of How to Calculate BMI Using the Formulas
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