Skinfold Body Fat Percentage Calculator (Jackson-Pollock 3-Site)

Enter your three skinfold measurements, age, and sex to estimate body fat percentage.

Skinfold Body Fat Percentage Calculator (Jackson-Pollock 3-Site)

Estimate body fat percentage from three skinfold measurements using the Jackson-Pollock formula.

This is an estimate for general informational purposes only, not medical advice. Accuracy depends heavily on correct caliper technique and site location — results can vary noticeably between different people taking the same measurements.

The Jackson-Pollock 3-site method estimates body density from three skinfold measurements (chest, abdomen and thigh for men; triceps, suprailiac and thigh for women), then converts that density to a body fat percentage using the Siri equation.

Example

  • With the default values shown above, this calculator returns: Estimated Body Density ≈ 1.0677; Estimated Body Fat Percentage ≈ 13.6%.

Frequently Asked Questions

Which three sites are measured?

For men: chest, abdomen, and thigh. For women: triceps, suprailiac, and thigh. This calculator asks only for the sum of the three measurements in millimeters.

How accurate is the skinfold method?

When performed by a trained, consistent technician, skinfold methods can be reasonably accurate, but they are generally less precise than lab methods like DEXA scanning or hydrostatic weighing.

Sources

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