What BMI Range Is Considered Obese in the US? CDC 2026 Guidelines
Official obesity classification according to the Centers for Disease Control and Prevention
Quick Answer
According to CDC guidelines, a BMI of 30.0 or higher is classified as obese. This is further divided into three classes: Class I (30.0-34.9), Class II (35.0-39.9), and Class III (40.0+), also known as severe obesity.
CDC BMI Classification System
| Category | BMI Range | Health Risk Level |
|---|---|---|
| Underweight | < 18.5 | Increased risk of malnutrition |
| Normal | 18.5 - 24.9 | Lowest risk |
| Overweight | 25.0 - 29.9 | Slightly increased risk |
| Obese Class I | 30.0 - 34.9 | Increased risk |
| Obese Class II | 35.0 - 39.9 | High risk |
| Obese Class III | 40.0+ | Very high risk |
Health Risks Associated With Obesity
Cardiovascular Risks
- • Coronary heart disease
- • High blood pressure
- • Stroke
- • Heart failure
Metabolic & Other Risks
- • Type 2 diabetes
- • Certain cancers
- • Sleep apnea
- • Joint problems
Why BMI Alone Isn't Enough
While BMI is a useful screening tool, it has limitations. The CDC recommends using additional measurements for a complete assessment:
Waist Circumference
Measures central obesity, a stronger predictor of health risks
Body Composition
Differentiates muscle mass from body fat
Health Markers
Blood pressure, cholesterol, and glucose levels
Key Takeaways
- 1
CDC defines obesity as BMI ≥ 30: This is the standard used in clinical settings across the United States.
- 2
Three classes of obesity: Each class represents increasing health risk and may require different treatment approaches.
- 3
BMI is a screening tool: Combine with waist measurement and other health markers for complete assessment.
Authority Source
Information based on the CDC Adult BMI Classification Guidelines (2026).