How is obesity measured?

Usually using BMI (w/h2) which correlates w/total body fat. Healthy (18.5-25) overweight (25-30) obese I (30-35) obese II (35-40) obese III (>40) Although BMI alone is not diagnostic, waist circumference and waist/hip ratio are useful to categorize pt as normal or overweight. Individuals w/waist circumference >94cm for men and 80cm women is a risk category