The equations for ideal body weight take into account gender and height, but these are only part of what should be considered when determining what a healthy body weight. When determining your ideal body weight, there are a number of variables you should take into account. However, in general, this is a good range to follow.īody mass index weight categories defined by the World Health Organization and the CDC Weight Category Of course, individual circumstances may mean that some people with higher muscle mass may fall outside of these numbers. However, you can use a BMI chart in combination with ideal body weight calculations to determine your ideal body weight range.įor most people, a healthy weight range will fall within the healthy BMI range of 18.5 – 25. ![]() Studies have even found that in practice, it might be more useful to use BMI ranges instead of IBW formulas for men and women. Plus, using a different equation will give you a slightly different value for ideal body weight. These formulas do not take into account other factors, such as lean body mass, genetic makeup, physical activity, or age.Īnd, unlike BMI, there is no set “healthy range” formally associated with ideal body weight. One of the downfalls of calculating ideal body weight is that it only gives one number based on an individual’s height and gender. Ideal Body Weight: A Range Rather Than One Number However, the Miller equation is slightly different as it uses more recent data, based on the 1983 tables instead of the 1959 tables that Robinson used. Similar to the Robinson equation, the Miller equation was formulated on the basis of the Metropolitan Life Insurance Company height-weight tables. Using this formula, a 5’5″ female would have an IBW of: Women: Ideal Body Weight = 49 + (1.7 × (height – 60)) Men: Ideal Body Weight = 52 + (1.9 × (height – 60)) This equation was created to better assess ideal body weight for drug dosing. The Robinson formula was developed on the basis of the 1959 Metropolitan Life Insurance Company height-weight tables. Women: Ideal Body Weight = 100 + (5 × (height – 60)) Robinson Formula Men: Ideal Body Weight = 106 + (6 × (height – 60)) ![]() Sometimes this common equation is also seen written using imperial units: Women: Ideal Body Weight = 45.5 kg + (2.2 × (height – 60)) Men: Ideal Body Weight = 48 kg + (2.7 × (height – 60)) Some people suggest that this formula can be adjusted for body frame by increasing by 10% for those with a large body frame or decreasing by 10% for those with a small body frame. The base equation assumes a medium frame. However, the Hamwi equation also uses body frame in predicting ideal body weight. The Hamwi formula is very similar to the Devine formula. To convert this to pounds, multiply by 2.2. So, in this formula, a 5’5″ female would have an IBW of: Men: Ideal Body Weight = 50 + (2.3 × (height – 60)) This equation was initially based on estimates of ideal body weight and not population studies. The Devine Formula uses sex and height to determine ideal body weight. This is still one of the most commonly used formulas to calculate ideal body weight in clinical practice today. ![]() Devine in 1974 to allow estimation of drug clearances in obese patients. The first IBW equation was introduced by Ben J. Since these formulas all give similar results, any one of these equations may be used to estimate IBW. These ideal body weight equations all share a general agreement among the different height-weight tables from which they were based. Most of the ideal body weight formulas were derived using population data and weight trends. Interestingly, these equations were first introduced to estimate drug metabolism and clearance from the body as research has found that these factors relate more to ideal body weight than actual total body weight. Several different formulas have been developed over the years to estimate ideal body weight. Ĭalculating what your IBW is one piece of information that you can use to ensure you are maintaining a healthy weight. On the other hand, obesity is associated with an increased prevalence of cardiovascular disease, hypertension, diabetes, and even certain forms of cancer. Maintaining a healthy body weight is associated with a decreased risk of chronic health issues and early mortality. ![]() This value is corresponds to a favorable nutrition status. Ideal body weight (IBW) is an estimate of an individual’s healthy weight based on certain parameters, most notably height and gender.
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