Of all those below, the Devine formula is the most widely used formula for the measurement of IBW. Each will begin at the same format of a base weight given a height of 5 feet, with a set weight increment added per inch over the height of 5 feet. This is where the bodyweight to height converter really kicks in, as obviously those who are taller will have greater lean mass and body fat compared with those who are shorter.Īll of the formulae below can be used to find your IBW, taking your height and weight into account. The taller somebody is, the more they weigh. This is because men generally have denser bones and greater muscularity, whilst women will carry extra body fat around their reproductive organs. As we age, we tend also to lose lean muscle mass and put on excess body fat, though this can be halted and even reversed through healthy diet and lifestyle choices.īroadly speaking, women will weigh less than men, and should have a few extra percentage points of body fat at every equivalent level. After this point, we tend to stop growing (in fact, we will eventually begin to shrink by a few inches). For men, this means post 16-17, for women more like 14-15. IBW calculators and formulae will take these into account, so that the number they give you will be as accurate and personalised as possible, within the above context.Īge shouldn’t matter too much after adolescence. This being said, there are some variables we can use to better judge our best guess at an ideal body weight. Initiating a healthy, active lifestyle, with a clean diet and plenty of exercise is far more important, and will represent a far greater use of your time and energy, than obsessing over a few points either way on any body weight measurement. Once more, we must make use of yardsticks and temper any measurements with our own good sense. There is also no measure or formula that can fully objectively, definitively, tell somebody what their perfect body weight is. It is just a good yardstick, especially for those with less muscle mass, in the same way that something like BMI (Body Mass Index) can be. The simple fact of being over or under your healthy IBW range needn’t mean that you are over- or underweight. You should always consider IBW in this light. In the same way that other, similar bodyfat measurements do, IBW doesn’t distinguish between lean body weight and body fat: it is very possible for somebody with low body fat and high musculature, such as an athlete, to appear overweight when figuring out their IBW. In fact, the further somebody is from what might be considered a normal body shape, the less accurate it becomes- here, we’re mostly thinking of overly muscular athletes such as bodybuilders and rugby players. These days, IBW most commonly used for both working out drug dosage, with metabolism of many drugs aligning more closely with IBW than with total body weight, and for weight classification in many sports. The formulas used to determine it are actually completely divorced from image and the idea of somebody’s ideal body weight. Applications include dosage estimates and the like. So, to convert directly from kg to lb, you multiply by 2.204622.IBW was originally designed with a medical outlook in mind. Or, you can find the single factor you need by dividing the A factor by the B factor.įor example, to convert from kilograms to pounds you would multiply by 1000 then divide by 453.59237. To convert among any units in the left column, say from A to B, you can multiply by the factor for A to convert A into grams then divide by the factor for B to convert out of grams. To convert from g into units in the left columnĭivide by the value in the right column or, multiply by the reciprocal, 1/x. Multiply by the conversion value in the right column in the table below. To simply convert from any unit into grams, for example, from 5 kilograms, just Where S is our starting value, C is our conversion factor, and For more specific calculations useĬonversions are performed by using a conversion factor. By knowing the conversion factor, converting between units can become a simple multiplication problem: This online conversion calculator will convert among different units of weight or mass.
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