Broca Index Calculator
Calculate classic Broca reference weight from height and compare current weight against that historical benchmark.
Slightly above Broca reference range.
Current Weight vs Broca Reference
Broca is a historical height-based reference formula. Interpret with modern BMI and body-composition tools.
| RANGE | CATEGORY |
|---|---|
| 0-90 | Well Below Broca Current weight is far below the Broca reference. |
| 90-100 | Near Broca (Low) Near the Broca reference and below or at target. |
| 100-110 | Near Broca (High) Slightly above Broca reference range. |
| 110-120 | Above Broca Above Broca reference with moderate divergence. |
| 120-130 | High Above Broca Substantially above Broca reference. |
| 130+ | Very High Above Broca Large divergence from Broca target; use with modern tools for context. |
Broca Formula
The classic Broca reference is:
Broca Weight (kg) = Height (cm) - 100
This formula is historical and simple. It does not account for frame size, age, sex differences, or body composition, so it should be treated as a rough benchmark only.
How To Use Broca Index Today
Use Broca as a quick historical reference, then validate with modern tools: the BMI Calculator, Ideal Weight Calculator, and Weight Loss Calculator.
For calorie planning linked to these targets, use the TDEE Calculator and Calorie Deficit Calculator.
If your goal is body-composition quality rather than scale-only targets, combine with the Body Fat Calculator and FFMI Calculator.
References
- Review of ideal-body-weight formula history (includes Broca formula context):Variability in IBW Formulae (PMC)
- CDC BMI category framework for modern screening context:CDC BMI Categories
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