Basics Print Overweight and Obesity Chart By Paige Waehner Updated January 07, 2019 Medically reviewed by a board-certified physician A. Green/Getty Images More in Weight Loss Basics Procedures Nutrition for Weight Loss Exercise for Weight Loss Diet Plans Medications Supplements The chart below, created by the NHLBI, provides a guideline for assessing the level of overweight and obesity by using two common calculations: Body Mass Index (BMI) and Waist Circumference. BMI uses a calculation using your weight and height to determine where you fall in the BMI categories - Underweight, normal, overweight, obese or extremely obese. Classification of Overweight and Obesity by BMI, Waist Circumference, and Associated Disease Risks Disease Risk* Relative to Normal Weight and Waist Circumference Disease Risk* Relative to Normal Weight and Waist Circumference BMI(kg/m2) ObesityClass Men 102 cm (40 in) or less Women 88 cm (35 in) or less Men > 102 cm (40 in) Women > 88 cm (35 in) Underweight < 18.5 - - Normal 18.5-24.9 - - Overweight 25.0-29.9 Increased High Obesity 30.0-34.9 I High Very High 35.0-39.9 II Very High Very High Extreme Obesity 40.0 + III Extremely High Extremely High * Disease risk for type 2 diabetes, hypertension, and CVD. + Increased waist circumference also can be a marker for increased risk, even in persons of normal weight. Your BMI and Waist Circumference BMI is one of the simplest, most commons ways to assess overweight and obesity in the general population, but it doesn't tell the whole story. The formula for calculating your BMI doesn't factor many things that can affect your BMI such as how much muscle you have, your gender, how your body fat is distributed and your frame size. All of these factors can skew the numbers, sometimes showing overweight or obesity when it isn't the case. Still, it's the best tool we have for the time being and can be useful when you take into account each individual's situation. Your waist measurement is also an important factor in our risk for things like diabetes and heart disease. As the chart shows, the higher your waist measurement, the more at risk you are. Calculate Your BMI This calculator uses the standard formula (Weight (lb) / [Height (in)]2 x 703) to calculate your BMI. Give it a try! Measure Your Waistline The chart above also includes waist circumference, which is another important way to assess health. If you're a man with a waistline of greater than 40 inches or a woman with a waistline of greater than 35 inches, you're at a higher risk for things like heart disease, diabetes, and high blood pressure. To measure your waist size (circumference), take off any loose clothing and mark the smallest area between the bottom of the ribs and the top of the hip bones. Wrap the tape measure around your waist, keeping the tape snug and parallel to the floor. Relax, exhale, and take the measurement. You can also compare your waist-to-hip ratio to get an idea of your health. Was this page helpful? Thanks for your feedback! Looking to lose weight? Our nutrition guide can help you get on the right track. Sign up for our newsletter and get it free! Email Address Sign Up There was an error. Please try again. Thank you, , for signing up. What are your concerns? Other Inaccurate Hard to Understand Submit Article Sources NIH. (n.d.). Losing Weight, Body Mass Index. In National Heart, Lung and Blood Institute. Continue Reading Know How to Measure Your BMI to Determine Weight Range What Should You Weigh Based on Your Height? How Normal Is Your Waist Circumference? Men Are Getting Fatter: Three Out of Four Are Obese What Is Causing Your Belly Fat? What Is the Average Weight for an Adult Woman? How to Calculate and Understand Your Waist to Hip Ratio When You Should Be Concerned About Your Belly Fat Rolls The Truth About Belly Fat How to Be Healthy and Watch for the Signs of Losing Too Much Weight How to Lose Weight the Right Way in Your 50s and 60s Can Acupuncture Help With Weight Loss? Is Weight Loss Safe When You Are Expecting? Learn How to Lose Your Gut If You're a Guy How Vitamin D Affects Weight Loss What's the Nutritional Value of Raisins?