Most experts determine healthy weight ranges with a calculation that takes both weight and height into account to give you a single number called a Body Mass Index (BMI) value. Knowing your waist size is also helpful, since studies show that people who have more fat around their abdomens have greater risks of heart disease and diabetes. If your waist size is over 40 inches (men) or 35 inches (women), your risks of developing health problems are increased, and losing some weight might help bring your numbers into a healthier range.
If your BMI is: Below 25
Your health risk profile is: Ideal. You probably don't need to lose weight for health reasons, though it might boost your self-esteem and confidence.
If your BMI is: 25 - 29.9
Your health risk profile is: Moderate. Your chance of developing heart disease, diabetes and other diseases associated with excess weight is higher, especially at the higher numbers in this range. Losing some weight can help you feel great now—and it can also prevent you from sliding into a higher risk category later on. Waist size over 40" (men) or 35" (women)? Your risk of health problems is increased, but weight loss can bring your numbers into a healthier range.
If your BMI is: 30 & Higher
Your health risk profile is: High risk. Officially categorized as “obese,” you might already be facing some health issues related to your weight. But take heart: you'll see the most dramatic effects on your health and well-being as the weight comes off. Waist size over 40" (men) or 35" (women)? With the help of your doctor, make a commitment to lose some weight—your health and well-being depend on it.
(Note that if you have a more athletic build, this BMI calculation could be overestimated, since more of your body weight is muscle. If you have a less athletic build, then this BMI calculation may be underestimated.)