Quick summary: About 35% of U.S. adults are classified as overweight, per CDC data, with a BMI between 25 and 29.9. Being overweight increases the risk of high blood pressure, type 2 diabetes, and heart disease. However, BMI does not tell the whole story — it does not distinguish between muscle and fat, nor does it account for age, sex, or ethnicity. Per WHO, Asian adults have a lower overweight threshold at BMI 23. For adults 65 and older, a BMI between 23 and 27 may be protective. Waist circumference — over 35 inches for women or 40 inches for men — is a key risk indicator that BMI misses entirely. This guide breaks down the numbers, the limits, and what actually matters for your health.
An overweight adult has a BMI between 25 and 29.9, according to CDC and WHO definitions. BMI is calculated from weight and height — it does not directly measure body fat. It is a screening measure, not a diagnostic tool.
Standard BMI categories for adults 20 and older, per CDC:
Underweight: BMI less than 18.5
Healthy weight: BMI 18.5 to less than 25
Overweight: BMI 25 to less than 30
Obese: BMI 30 or greater
BMI categories are the same for all adults regardless of age, sex, or race.
How common is it?
Per CDC data, about 35% of U.S. adults are classified as overweight (BMI 25.0–29.9). Another 27.4% are obese, and 5.7% are severely obese. That means nearly 3 in 4 U.S. adults are either overweight or have obesity. Worldwide, the WHO reports that 2.5 billion adults were overweight in 2022, which is 43% of all adults globally.
Health risks associated with overweight
Overweight individuals face increased risks for several serious health conditions, per CDC data:
High blood pressure (hypertension)
High cholesterol and abnormal lipids
Type 2 diabetes — nearly 9 out of 10 people with newly diagnosed type 2 diabetes are overweight
Heart disease and stroke
Certain types of cancer
Joint problems, including osteoarthritis
Respiratory conditions like asthma and sleep apnea
Mental health conditions, including depression
Obesity (BMI ≥30) carries significantly higher risks than overweight, including a 2–4 times greater chance of developing type 2 diabetes and heart disease, per CDC data. The more excess weight a person carries and the longer they carry it, the higher the risk.
BMI has limits — it is not the full picture
BMI is a screening measure, not a diagnostic tool. It should be considered alongside other factors when assessing an individual's health. Here is what BMI does not tell you:
It does not distinguish between muscle and fat
It does not account for where fat is distributed on the body
It can misclassify muscular individuals as overweight
It can underestimate body fat in older adults who have lost muscle mass
Special considerations for different populations
Asian adults: The WHO recommends a lower overweight threshold of BMI 23 for East, South, and Southeast Asian adults, as they face higher metabolic risks at lower BMI levels. Per WHO recommendations, Asian adults have lower BMI thresholds for overweight due to differences in body composition.
Adults 65 and older: A BMI between 23 and 27 may be associated with better survival rates in older adults, as it provides nutritional reserves against frailty and falls.
Athletes and muscular individuals: BMI may overestimate body fat in people with high muscle mass; use body fat percentage and waist circumference for a more accurate assessment.
Waist circumference matters
The NIH recommends measuring waist circumference alongside BMI. A waist measurement of more than 35 inches for women or more than 40 inches for men increases health risk, regardless of BMI. Extra fat around the abdomen is linked to higher risk for heart disease and type 2 diabetes.
Use a BMI calculator to check your number. Then pair it with a body fat calculator to get a clearer picture of your body composition. For practical, science-backed tips, see our complete guide to weight management strategies for BMI 25-30.
What about "metabolically healthy" overweight?
Some individuals who are overweight maintain normal blood pressure, cholesterol, and blood sugar levels — a condition called metabolically healthy overweight. However, long-term studies show they still have a 20-30% higher risk of cardiovascular events compared to healthy-weight peers. Physical activity and cardiorespiratory fitness play a significant role in this protection.
Small changes make a difference
Health professionals recommend losing 5% to 10% of your initial weight over about 6 months. Even a loss of just 3% to 5% of your current weight can lower triglycerides and glucose levels, reducing your risk of developing type 2 diabetes. Losing more than 3% to 5% can also improve blood pressure and LDL cholesterol.
Measuring waist correctly: Wrap a tape measure around your midsection just above the hipbones, after exhaling normally. This gives a consistent, reliable measurement each time.
References & Sources
CDC: Disability and Obesity — Overweight and Obesity Definitions
WHO: Obesity and Overweight — Global Prevalence and Definitions
NIH/NHLBI: Aim for a Healthy Weight — Waist Circumference and Health Risks
BMI Calculator Blog: BMI for Special Populations — Asian, Seniors & Athletes
Frequently Asked Questions About Overweight People
What is the definition of an overweight person?
An overweight person is an adult with a BMI between 25 and 29.9, according to the CDC and WHO. BMI is calculated from height and weight and is used as a screening tool for weight categories.
What percentage of adults are overweight?
In the U.S., about 35% of adults are classified as overweight, per CDC data. Worldwide, 43% of adults (2.5 billion people) were overweight in 2022, per the WHO.
Can you be overweight and still be healthy?
Some overweight individuals maintain normal blood pressure, cholesterol, and blood sugar — a condition called metabolically healthy overweight. However, long-term studies show they still have a 20-30% higher risk of cardiovascular events compared to healthy-weight peers.
Is BMI accurate for athletes or muscular people?
Not always. BMI does not distinguish between muscle and fat. Muscular individuals can be classified as overweight despite having low body fat. BMI may not be the best measurement for some people.
What is a healthy BMI for Asian adults?
The WHO recommends a lower overweight threshold of BMI 23 for Asian adults. Use an Asian BMI calculator for a more accurate risk assessment.
Is a slightly higher BMI healthy for older adults?
For adults 65 and older, a BMI between 23 and 27 may be protective against malnutrition and falls. Focus on mobility and strength rather than strict weight loss.
What is a healthy waist circumference?
Per NIH guidelines, a waist circumference of more than 35 inches for women or more than 40 inches for men increases health risk, regardless of BMI.
How much weight should an overweight person aim to lose?
Health professionals recommend losing 5% to 10% of your initial weight over about 6 months. Even 3% to 5% weight loss can lower triglycerides and glucose and reduce type 2 diabetes risk.
Related Articles
What Is Considered Overweight? BMI Limits, Waist Risk, and When the Label Misleads
Overweight Definition: What It Means for Your Health (BMI 25-29.9 and Beyond)
Weight Management Strategies for BMI 25-30 Overweight: Proven Tips for a Healthy Range
BMI Calculator Blog. This content is provided for educational and informational purposes only. We encourage sharing with proper attribution to our site. Unauthorized commercial use is prohibited. Medical Disclaimer: This content does not replace professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified physician or other licensed health provider with any questions regarding your body composition, weight status, or health goals.