The best and most accurate way to measure body fat.
According to Carol Sayre as reported on CNN:
Body Mass Iindex (BMI)
Your BMI provides a lot more information than your bathroom scale, specifically a measure of body fat. "Fat is more important than weight," says Peter Katzmarzyk, associate executive director for population science at the Pennington Biomedical Research Center in Baton Rouge, Louisiana. "Excessive fatness is the definition of obesity, not excessive weight -- and having too much fat can cause serious health problems."
This calculation uses a ratio of weight to height to estimate body fat and obesity.
Calculate your BMI with this online utility.
A BMI of less than 18.5 is underweight. A BMI of 18.5--24.9 is normal. A BMI of 25--29.9 is overweight. A BMI of 30 or higher is obese.
Since the BMI tool cannot distinguish between lean muscle mass and body fat, it has a tendency to overestimate the level of body fat in people who have a lot of muscle -- say, Arnold Schwarzenegger -- and underestimate the amount of body fat in people who have lost muscle mass, such as the elderly.
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