Free calculator

The BMI calculator for amputees

Standard BMI doesn't account for missing limb mass, so it reads artificially low after amputation. This tool applies validated body-segment correction to give you an accurate, weight-adjusted BMI.

Height (pre-amputation)

ft in

feet & inches — your height before amputation, or your best estimate. This matters especially for bilateral amputees, since a post-amputation standing/measured height won't reflect true stature.

Current weight pounds

Amputation level per limb Set each limb independently — leave as "None" if not amputated. Supports mixed levels (e.g. below-knee on one leg, above-knee on the other).

Left leg

Right leg

Left arm

Right arm

Standard BMI (uncorrected) —

Corrected BMI —

Estimated full-body weight —

—

This calculator is an educational and reference tool. It is not a medical device, does not diagnose or treat any condition, and does not replace personal medical advice. Corrected BMI is an estimate based on published body-segment weight tables and may not reflect individual body composition exactly.

Want to learn more?

Dig into why standard BMI falls short for amputees, the research behind the correction method, or common questions.

Why It Matters

The background on why standard BMI reads artificially low after limb loss.

Research & Method

The body-segment tables and formula behind the correction, with citations.

FAQ

Answers to common questions about using this tool.