Ideal Body Proportions Calculator
Aesthetic physique calculator based on the Golden Ratio and McCallum's formula. Calculates ideal measurements for bodybuilding symmetry.
About
In competitive bodybuilding and modeling, size is secondary to symmetry. The "Grecian Ideal" relies on specific ratios between body parts to create an aesthetically pleasing flow. This tool utilizes John McCallum's cumulative formulas, widely regarded as the gold standard for realistic yet impressive classic physique targets. It acts as a digital tailor, defining measurement goals relative to your skeletal structure (wrist size).
Achieving the Golden Ratio (1:1.618) often implies that the shoulder circumference should be approximately 1.618 times the waist circumference (Adonis Index). This calculator provides the exact numbers required to balance your upper and lower body, preventing the "top-heavy" or "chicken leg" look common in unbalanced training programs.
Formulas
The core McCallum formula starts with the wrist circumference w:
Subsequent measurements are derived from the Chest size C:
Reference Data
| Body Part | Ratio Source | Multiplier (approx) | Goal |
|---|---|---|---|
| Chest | McCallum | 6.5 × Wrist | Foundation size |
| Waist | Golden Ratio | 0.70 × Chest | V-Taper definition |
| Hips | McCallum | 0.85 × Chest | Lower body mass |
| Biceps | McCallum | 0.36 × Chest | Upper arm balance |
| Calves | Classic Symmetry | ≈ Biceps Size | Visual symmetry |
| Neck | McCallum | 0.37 × Chest | Proportionality |