📏 Skinfold Body Density Calculator
7-9 site formula for accurate body fat percentage estimation (used in research)
🦵 Lower Body Measurements
💪 Optional Additional Sites (for 9-site method)
📊 Your Body Composition Results
Body Density
0.00
g/cm³
Body Fat Percentage
0.0
%
ℹ️ How to Use This Calculator & Measurement Guide ▼
📝 Skinfold Measurement Instructions
- Use a proper skinfold caliper (e.g., Harpenden, Lange, or Slim Guide)
- Take all measurements on the right side of the body
- Grasp the skinfold firmly between thumb and index finger
- Place caliper jaws perpendicular to the skinfold, about 1cm from fingers
- Take the measurement 2-3 seconds after applying caliper pressure
- Record the measurement to nearest 0.5mm
- Take 2-3 measurements at each site and use the average
📍 Measurement Sites
Standard 7-site method (Jackson & Pollock):
- Chest: Diagonal fold halfway between nipple and armpit
- Midaxillary: Vertical fold at mid-axillary line at level of xiphoid process
- Triceps: Vertical fold at back of upper arm, midway between shoulder and elbow
- Subscapular: Diagonal fold below shoulder blade at 45° angle
- Abdomen: Vertical fold 2cm to the right of the navel
- Suprailiac: Diagonal fold above hip bone at anterior axillary line
- Thigh: Vertical fold midway between knee and hip on front of thigh
Optional additional sites for 9-site method (Parillo):
- Biceps: Vertical fold at front of upper arm, midway between shoulder and elbow
- Calf: Vertical fold at maximal circumference of calf
🏋️ Example Calculation
Male athlete measurements (mm):
- Chest: 5mm
- Midaxillary: 6mm
- Triceps: 8mm
- Subscapular: 7mm
- Abdomen: 10mm
- Suprailiac: 9mm
- Thigh: 12mm
- Body Density: 1.072 g/cm³
- Body Fat %: 8.5% (Athletic range)
📊 Body Fat Classification
| Category | Men (%) | Women (%) |
|---|---|---|
| Essential Fat | 2-5% | 10-13% |
| Athletic | 6-13% | 14-20% |
| Fitness | 14-17% | 21-24% |
| Average | 18-24% | 25-31% |
| Obese | 25%+ | 32%+ |
⚠️ Important Notes
- This method has ±3-5% margin of error when performed correctly
- Results may vary based on technician skill and caliper quality
- Not suitable for individuals with very high or very low body fat
- For most accurate results, have measurements taken by a professional
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