Amputation BMI Calculator
body { font-family: Arial, sans-serif; line-height: 1.6; }
.calculator-container { border: 1px solid #ccc; padding: 20px; border-radius: 8px; max-width: 600px; margin: 20px auto; box-shadow: 2px 2px 10px rgba(0,0,0,0.1); }
label { display: block; margin-bottom: 5px; font-weight: bold; }
input[type="number"] { width: calc(100% – 10px); padding: 8px; margin-bottom: 15px; border: 1px solid #ccc; border-radius: 4px; }
button { background-color: #4CAF50; color: white; padding: 10px 15px; border: none; border-radius: 4px; cursor: pointer; font-size: 16px; }
button:hover { background-color: #45a049; }
#result { margin-top: 20px; padding: 15px; background-color: #f0f0f0; border-radius: 4px; text-align: center; font-size: 1.2em; font-weight: bold; }
.explanation { margin-top: 30px; }
.explanation h2 { color: #333; }
Amputation BMI Calculator
This calculator helps estimate BMI for individuals who have undergone amputation. It requires the weight of the residual limb (if available) to adjust for the missing mass.
Weight (kg):
Residual Limb Weight (kg):
Height (cm):
Calculate BMI
Understanding BMI for Amputees
Body Mass Index (BMI) is a widely used metric to assess body fatness based on height and weight. However, for individuals who have had an amputation, standard BMI calculations can be misleading because the removed limb significantly alters the total body weight.
To provide a more accurate estimation, this calculator adjusts the reported weight by subtracting the estimated weight of the amputated limb. This results in a "corrected" weight that better reflects the mass of the remaining body. The corrected weight is then used in the standard BMI formula:
Corrected BMI = (Corrected Weight in kg) / (Height in m)²
Where:
Corrected Weight = Total Weight (kg) – Residual Limb Weight (kg)Height is converted from cm to meters (divide by 100).
Important Considerations:
The accuracy of this calculation depends on the accuracy of the residual limb weight provided. Often, this value is an estimation.
This is an estimation tool. Always consult with a healthcare professional for personalized health assessments and advice.
BMI is just one indicator of health. Other factors like body composition, muscle mass, and overall fitness are also crucial.
function calculateAmputeeBMI() {
var weight = parseFloat(document.getElementById("weight").value);
var residualLimbWeight = parseFloat(document.getElementById("residualLimbWeight").value) || 0; // Default to 0 if empty or not a number
var heightCm = parseFloat(document.getElementById("height").value);
var resultDiv = document.getElementById("result");
if (isNaN(weight) || isNaN(heightCm) || weight <= 0 || heightCm <= 0) {
resultDiv.innerHTML = "Please enter valid numbers for weight and height.";
return;
}
var correctedWeight = weight – residualLimbWeight;
if (correctedWeight <= 0) {
resultDiv.innerHTML = "Corrected weight cannot be zero or negative. Please check your inputs.";
return;
}
var heightM = heightCm / 100;
var bmi = correctedWeight / (heightM * heightM);
var bmiCategory = "";
if (bmi = 18.5 && bmi = 25 && bmi < 29.9) {
bmiCategory = "Overweight";
} else {
bmiCategory = "Obesity";
}
resultDiv.innerHTML = "Estimated BMI: " + bmi.toFixed(2) + " (" + bmiCategory + ")";
}