This anthropometric health calculator determines body frame silhouette profiles and evaluates cardiovascular metabolic risk using Waist-to-Hip Ratio (WHR). Fitness coaches, apparel shoppers, and health-conscious individuals can classify body geometry and review World Health Organization (WHO) metabolic fat distribution benchmarks.

### Silhouette Classification and WHR Metrics The evaluation engine analyzes circumferential measurements and proportional deltas:

- **Waist-to-Hip Ratio (WHR):** $$\text{WHR} = \frac{\text{Waist Circumference}}{\text{Hip Circumference}}$$ - **WHO Health Risk Benchmarks:** - *Females:* $\text{WHR} < 0.80$ indicates Low Risk; $\ge 0.80$ indicates Elevated Risk. - *Males:* $\text{WHR} < 0.90$ indicates Low Risk; $\ge 0.90$ indicates Elevated Risk. - **Silhouette Geometry Rules:** - *Hourglass:* Bust and hips balanced within 2.5 cm ($|\text{Bust} - \text{Hip}| \le 2.5$) with pronounced waist tapering ($\text{Bust} - \text{Waist} \ge 20\text{ cm}$). - *Pear / Triangle:* Hips substantially wider than bust ($\text{Hip} - \text{Bust} \ge 5\text{ cm}$) with defined waist. - *Inverted Triangle:* Broad chest or shoulders exceeding hips by 5+ cm. - *Apple / Round:* Wider waist relative to chest and hips ($\text{Waist} \ge \text{Bust} \times 0.9$). - *Rectangle / Athletic:* Balanced proportions with minimal waist narrowing.

### Worked Numeric Example Suppose an adult female enters: - **Bust:** 92 cm - **Waist:** 70 cm - **Hips:** 96 cm

**Evaluation Steps:** 1. **WHR Calculation:** $70 / 96 \approx \mathbf{0.73}$. 2. **Health Risk Assessment:** $0.73 < 0.80 \rightarrow$ **Low Risk** tier. 3. **Proportional Deltas:** $\text{Hip} - \text{Bust} = 96 - 92 = 4\text{ cm}$; $\text{Bust} - \text{Waist} = 92 - 70 = 22\text{ cm}$. 4. **Dominant Silhouette:** Matches the classic **Hourglass** profile.

### Privacy Note All anthropometric calculations execute locally in client-side React state. Personal body measurements are never logged, stored, or transmitted over any network.