Calculate the BMI for Amputees

On this site, you can calculate the body mass index (BMI), when arms or legs have been amputated. Enter the weight in kilograms and the body height in centimeters. When both legs are amputated, please enter the theoretical height with legs. First, the theoretical weight is calculated. This can also be used to calculate the ABSI for amputees.

The weight of the missing body parts is estimated based on averages from several scientific studies. The values in percentages are: hand 0.7, forearm 3, whole arm 6, foot 1.5, lower leg 7, whole leg 17. The entire body with all complete limbs is considered 100 percent. For example, with a body weight of 50 kilograms and a leg amputated at the femur, the theoretical weight would be 60.2 kilograms, since 17 percent of this value corresponds to 10.2 kilograms.
The formula for the theoretical weight is weight/(100 - missing limbs)*100
The theoretical weight is the weight one would have if all complete body parts were present. This theoretical weight serves as the basis for calculating the BMI according to the formula BMI = weight / (height in meters)². It can also be used for comparisons or other health-related statements, or for other calculations that work with body weight. Body weight is an important biometric characteristic of humans, just like height.
In case of amputation of both legs, the theoretical height must be estimated, or the value before amputation is known. This value has to be entered at height.
Physically speaking, the correct designation is mass, so theoretical mass instead of the weight which is used here, but weight in kilograms is very common in colloquial language and is therefore also called so here.