CDC NHANES Calibrated • Multi-Girth Precision

Anthropometric Body Fat & Somatotype Engine

Standard bathroom scales and basic BMI formulas fail to distinguish between functional skeletal muscle and excess adipose storage. This clinical engine uses multi-girth anthropometric regression models calibrated against national CDC NHANES health datasets to accurately determine your true body fat percentage, lean muscle mass, Heath-Carter somatotype profile, metabolic daily energy burn, and customized daily protein targets.

Body Measurements

Biological Sex

Age (Years)

Height (in)

Weight (lbs)

1. Core Anthropometric Girths (Required)

Neck Girth (below Adam's apple)

Waist (Navel Level, Relaxed)

Hips (Widest Point)

Chest (Mid-Sternum, Relaxed)

2. Muscularity Girths & Daily Activity

Bicep (Flexed Peak)

Forearm (Maximum Girth)

Thigh (Gluteal Fold)

Calf (Standing Maximum)

Daily Activity Level

Estimated Body Fat Percentage

--%

Enter your measurements to generate diagnostic readout

Athletic Fitness Average Elevated

Lean Body Mass

Metabolically active muscle & bone

Total Fat Mass

Stored adipose tissue

Normalized FFMI

Target: 20.0–22.0 (Athletic)

Waist-to-Height

Clinical Target: <0.50 (Low Visceral Risk)

Evidence-Based Daily Protein Targets

Weight Maintenance Baseline (1.4 g/kg): -- g

Muscle Hypertrophy / Athletic Goal (2.0 g/kg LBM): -- g

Basal Metabolic Rate (BMR)

Calories at complete rest

Daily Expenditure (TDEE)

Maintenance baseline

Fat Loss Target (-20%)

Controlled safe deficit

Muscle Gain Target (+10%)

Lean mass surplus

Daily Hydration Baseline

Fluid baseline with training

Structural V-Taper Ratio

Chest / Waist proportion

✓ Physiological Positives (Strengths)

Enter measurements above to analyze physiological strengths.

⚠ Areas of Concern & Risk Flags

Enter measurements above to identify health and risk flags.

🎯 Actionable Clinical Directives (Where to Work On)

Personalized nutrition, training, and recovery directives will appear once measurements are calculated.