Ideal Body Weight Calculator for Amputations
Get your adjusted IBW using clinically validated Devine and Hamwi formulas, corrected for limb weight.
Quick Presets:
| Amputation Type | % Body Weight | Amputation Type | % Body Weight |
|---|---|---|---|
| Below Knee (BK) | 5.9% | Bilateral BK | 11.8% |
| Above Knee (AK) | 11.6% | Bilateral AK | 23.2% |
| Foot Only | 1.8% | Both Feet | 3.6% |
| Below Elbow | 2.3% | Above Elbow | 5.0% |
| Hand Only | 0.8% | Entire Arm | 6.5% |
| Formula | Men (kg) | Women (kg) | Notes |
|---|---|---|---|
| Devine | 50 + 2.3/in >5ft | 45.5 + 2.3/in >5ft | Most widely used |
| Hamwi | 48 + 2.7/in >5ft | 45.4 + 2.27/in >5ft | Common in dietetics |
| Robinson | 52 + 1.9/in >5ft | 49 + 1.7/in >5ft | Often used in pharmacy |
| Miller | 56.2 + 1.41/in >5ft | 53.1 + 1.36/in >5ft | Lower estimates |
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It is not a magic number that works for every person, when dealing about the ideal Body Weight. Only height does not show, how much you should weigh, many folks of same height look entirely different and carry their weight in different ways. The actual sign for that?
Percentage of body fat. That truly gives useful information about your health, because two folks can have the same weight, but their bodies look very differently.
No one number shows your ideal weight
Over years people developed several formulas for guessing what a healthy weight could be. The Devine-formula is commonly used; for men it starts at 50 kilos basic, then adds 2.3 kilos for every inch above five feet. Also there is a version that uses pounds (110 pounds as base, plus 5 pounds for every inch above five feet).
There is also the Robinson-formula, the Miller-formula and the Hamwi-formula, each with a slihgtly different approach. But here is the point: those formulas commonly give different results for the same person, which shows that no single formula can determine the “right” weight for anyone.
Body mass index, usually called BMI, is another tool that folks commonly use. It is a simple relation between weight and height, that sorts folks into groups… Underweight, normal weight, overweight or obese.
The most common guidelines advise a healthy BMI between 18.5 and 24.9. Even so BMI has some real weaknesses. It does not consider muscle, bone density or the real makeup of your body.
Folk with a lot of muscle and little fat could way more than the number says, but stay in a healthy range, muscle takes less space than fat.
Also your body type matters. Whether you are ectomorph, mesomorph or endomorph, that affects how your body reacts to weight changes. Frame size matters, width of shoulders, size of hips and ribcage all act on what feels right for your body.
Age, sex, height and body makeup all play into the calculation, so there is no fast answer in a simple number. For those that follow training targets, body fat of 8 to 15 percent commonly tends to be. If you do CrossFit or similar activity-based exercise, reaching around 15 percent of body fat while you build muscle in a solid BMI range works well.
Studies show that women that compete in certain training standards, usually weigh between 65 and 70 kilos, while male athletes around 85 to 90 kilos.
Ideal weight calculators are a medical tool… They estimate a weight range that relates to better health results. But it is only one part of a bigger whole.
No single body measure can say everything about your health or possible risks thathide themselves. All bodies differ, so what is healthy for one person might not match what is healthy for another.
