Skinfold Body Fat Calculator (3-Site)
Estimate body fat percentage using the Jackson-Pollock 3-site skinfold method for males.
Body Fat Percentage
14.2 %
Body Fat Percentage vs Chest Skinfold
सूत्र
## Jackson-Pollock 3-Site Method (Male) ### Step 1: Body Density **D = 1.10938 - 0.0008267 x S + 0.0000016 x S^2 - 0.0002574 x Age** Where S = sum of chest + abdomen + thigh skinfolds in mm. ### Step 2: Siri Equation **Body Fat % = (495 / D) - 450** This converts body density to body fat percentage.
हल किया गया उदाहरण
A 30-year-old male with chest 12mm, abdomen 20mm, thigh 15mm.
- 01Sum = 12 + 20 + 15 = 47 mm
- 02D = 1.10938 - 0.0008267 x 47 + 0.0000016 x 2209 - 0.0002574 x 30
- 03= 1.10938 - 0.03885 + 0.00354 - 0.00772 = 1.06635
- 04Body Fat = (495 / 1.06635) - 450 = 14.1%
अक्सर पूछे जाने वाले प्रश्न
How accurate are skinfold measurements?
When performed by a trained technician, skinfold measurements can be accurate within 3-4%. Consistency in measurement technique is critical.
Where exactly are the 3 sites measured?
Chest: diagonal fold halfway between the nipple and armpit crease. Abdomen: vertical fold 2 cm to the right of the navel. Thigh: vertical fold on the front of the thigh midway between hip and knee.
What tools do I need?
You need a skinfold caliper. Affordable plastic calipers can work for self-testing, but Harpenden or Lange calipers are used in professional settings.
सीखें