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BMI Amputee Calculator

Clinically accurate BMI assessment for individuals with limb loss. This tool uses corrected weight formulas to calculate BMI for amputees, providing a better reflection of metabolic health.

Amputee Calculator

lbs
ft
in

WHO Standard Result

Healthy weight
23.0
kg/m²
Underweight < 18.5
Healthy 18.5–24.9
Overweight 25–29.9
Obese ≥ 30
Underweight < 18.5
Healthy 18.5–24.9
Overweight 25–29.9
Obese ≥ 30

Healthy BMI range: 18.5 kg/m² - 25 kg/m² Healthy weight for your height: 128.9 lbs - 174.2 lbs Your weight is within the healthy range, but you are slightly inclined towards being overweight.

How to Calculate BMI for Amputee Patients?

Standard BMI is a simple ratio of weight to height ($W / H^2$). When a limb is lost, the total body weight decreases significantly, but the person's height remains the same. This often results in an artificially low BMI that suggests a "healthy" or "underweight" status, even if the individual has high levels of body fat or metabolic risk.

Our BMI amputation calculator uses clinical research to estimate what the individual would weigh if the limb were present, allowing for a standard health risk assessment.

The Amputee BMI Formula

Corrected Weight = Actual Weight / (1.0 - Total % of Limbs Lost)
  • Entire Leg: ~16.0% of total body weight
  • Lower Leg (Below Knee): ~5.9% (including foot)
  • Entire Arm: ~5.0% of total body weight