Bmi Weight(kg) Body mass index Height(m) Category BMI Underweight< 18.50 Normal 18.5-23.99 Overweight≥24(23) Obese ≥28(25) Interpretation varies by ethnic group Because muscle density is greater than fat, BMi may overestimate the body fat content of very muscular people. In addition, bMi may also underestimate the body fat content of people with reduced muscle mass(such as the elderly)Body Mass Index Category BMI Underweight < 18.50 Normal 18.5 – 23.99 Overweight ≥ 24（23） Obese ≥ 28 (25) 2 Height(m) Weight(kg) BMI  • Interpretation varies by ethnic group Because muscle density is greater than fat, BMI may overestimate the body fat content of very muscular people. In addition, BMI may also underestimate the body fat content of people with reduced muscle mass (such as the elderly)