What Waist Size Is Considered Obese for US Adults
Understanding central obesity measurement standards
Quick Answer
For US adults, central obesity is defined as a waist circumference of 40 inches (102 cm) or more for men and 35 inches (88 cm) or more for women. These thresholds indicate excess abdominal fat, which is linked to increased health risks.
CDC Waist Circumference Guidelines
| Gender | Normal Waist | Increased Risk | High Risk (Central Obesity) |
|---|---|---|---|
| Men | < 37 inches (94 cm) | 37-39.9 inches | ≥ 40 inches (102 cm) |
| Women | < 31.5 inches (80 cm) | 31.5-34.9 inches | ≥ 35 inches (88 cm) |
Health Risks of Central Obesity
Cardiovascular Risks
- • Increased risk of heart disease
- • Higher blood pressure
- • Elevated LDL ("bad") cholesterol
- • Increased risk of stroke
Metabolic & Other Risks
- • Type 2 diabetes
- • Insulin resistance
- • Sleep apnea
- • Certain cancers (breast, colon)
Why Waist Size Matters More Than BMI
Waist circumference is a better predictor of health risks than BMI alone because it measures visceral fat—the dangerous fat stored around organs. Two people with the same BMI can have very different waist sizes and very different health risks.
Apple Shape (Central Obesity)
Excess fat around the abdomen. Higher risk of metabolic syndrome and cardiovascular disease.
Pear Shape
Excess fat around hips and thighs. Lower health risks compared to central obesity.
Key Takeaways
- 1
Men ≥ 40 inches: Considered centrally obese
- 2
Women ≥ 35 inches: Considered centrally obese
- 3
Central obesity is dangerous: Visceral fat increases health risks significantly.