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Body Fat (Skinfold 7 Site) Calculator

Work out body fat (skinfold 7 site) instantly with clear inputs, formula shown and shareable results.

About Body Fat (Skinfold 7 Site) Calculator

The seven-site Jackson-Pollock protocol uses chest, midaxillary, triceps, subscapular, abdomen, suprailiac and thigh folds. Its wider sampling makes it more reliable than three-site versions for people with unusual fat distribution. A 95 mm sum at 32 gives a density near 1.0619 and about 16.4% fat for a man.

Formulas

JP 7-site density, men

D = 1.112 - 0.00043499 S + 0.00000055 S^2 - 0.00028826 x age

JP 7-site density, women

D = 1.097 - 0.00046971 S + 0.00000056 S^2 - 0.00012828 x age

Worked example

With the default values below, Body Fat (Skinfold 7 Site) Calculator returns Estimated Body Fat of 14.17%. Change any input above and every figure here is recalculated in your browser.

Inputs used

Sum of all seven skinfoldsminimum 7 mm
95 mm
Ageaccepts 10–90 years
32 years
Sexone of Male, Female
Male

Results

Estimated Body Fat
14.17%
Estimated Body Density
1.0664 g/cm3
Average Fold Thickness
13.57 mm
Category
Fit

Step by step

  1. 1Values used
  2. 2JP 7-site density, men
  3. 3JP 7-site density, women
  4. 4Estimated Body Fat= 14.17
  5. 5Estimated Body Density= 1.0664 g/cm3
  6. 6Average Fold Thickness= 13.57 mm
  7. 7Category= Fit

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 4 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • These figures are population-average estimates, not a medical assessment or diagnosis. Body composition equations carry errors of several percentage points, and healthy ranges vary with age, ethnicity, muscularity and medical history. Discuss weight or body composition goals with a qualified clinician or dietitian.
  • This is an estimate for general information and not professional medical advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

These figures are population-average estimates, not a medical assessment or diagnosis. Body composition equations carry errors of several percentage points, and healthy ranges vary with age, ethnicity, muscularity and medical history. Discuss weight or body composition goals with a qualified clinician or dietitian.

Frequently Asked Questions

Is seven sites better than three?

Yes for atypical fat distribution, since averaging more locations reduces the effect of any single unusual site. For most people three sites is within a percentage point.

Which caliper should I use?

A calibrated spring caliper such as Harpenden or Lange. Plastic calipers apply inconsistent pressure and add error.

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Body Fat (Skinfold 7 Site) Calculator | Calcrivo