Free Skinfold Body Fat Calculator
Estimate body fat percentage using the Jackson-Pollock 3-site skinfold method for males.
mm
mm
mm
years
Body Fat Percentage
14.2 %
Sum of Skinfolds47.0 mm
Body Density1.06634 g/cc
Body Fat Percentage vs Chest Skinfold
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.
Example Calculation
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%
Frequently Asked Questions
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