Which BMI range is considered obesity?

• A. 18.5-24.9
• B. 30+
• C. 25-29.9
• D. <18.5

Answer: (B)

BMI categories show how weight relates to health risk. Obesity is defined as a body mass index of 30 or higher. The surrounding ranges map to underweight (<18.5), normal weight (18.5–24.9), and overweight (25–29.9). Crossing into 30 or more signals obesity, which carries a higher risk for conditions such as type 2 diabetes, hypertension, and heart disease. BMI is calculated as weight in kilograms divided by height in meters squared, a quick screening tool that isn’t perfect but is useful for general risk stratification. So the range indicating obesity is 30 and above.