Why standard BMI falls short
Standard BMI is calculated from total body weight without accounting for missing limb mass, so it reads artificially low after amputation. Amputee BMI applies validated body-segment correction to produce a weight-adjusted figure that better reflects body composition.
The calculator runs entirely in your browser. Enter your pre-amputation height, current weight, and the level of limb loss on each limb — it returns a corrected BMI on the spot, and nothing you type leaves your device.
What you can enter
- Height before amputation — in cm/kg or ft & in/lb
- Current weight
- Level of limb loss, per limb — above-knee, below-knee, or foot/partial foot; above-elbow, below-elbow, or hand/partial hand — so mixed cases are handled correctly