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Jackson-Pollock 3-Site Body Fat Calculator

Estimate your body-fat percentage from three skinfold measurements and your age using the Jackson-Pollock 3-site method, one of the established skinfold-based body-composition equations.

1

Sex

Select the sex used by the Jackson-Pollock equation.
2

Age

years
Enter your age in years.
3

Chest Skinfold

mm
For the male equation, measure the chest skinfold. For the female equation, this field is not used.
4

Abdomen / Triceps Skinfold

mm
Male: abdomen skinfold. Female: triceps skinfold.
5

Thigh Skinfold

mm
Enter the thigh skinfold measurement in millimeters. The standard site differs by sex only in the other two measurement locations.

Your estimated body-fat percentage:

0%

Your result is calculated from your age and three skinfold measurements using the Jackson-Pollock 3-site method.

Jackson-Pollock 3-Site Result

0%
body fat
0.000
body density
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This calculator is for informational purposes only and does not provide medical or health advice. Skinfold-based estimates can differ from actual body-fat percentage. If you have health concerns, consult a qualified medical professional.
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How Does the Jackson-Pollock 3-Site Body Fat Calculator Work?

The Jackson-Pollock 3-Site Body Fat Calculator estimates body-fat percentage from age and three skinfold measurements. The method first estimates body density using a sex-specific Jackson-Pollock equation and then converts body density into estimated body-fat percentage using the Siri equation. The three measurement sites are different for men and women, so the calculator uses the appropriate equation and skinfold locations based on the selected sex.

Term What it means In the calculation Why it matters
Jackson-Pollock 3-site A skinfold-based body-composition method that estimates body density from three skinfold measurements and age. Body density equation It provides the mathematical foundation for the body-composition estimate.
Male sites Chest, abdomen and thigh. 3 skinfolds These measurements are used with the male-specific Jackson-Pollock equation.
Female sites Triceps, suprailiac and thigh. 3 skinfolds These measurements are used with the female-specific Jackson-Pollock equation.
Skinfold sum The combined thickness of the three measured skinfolds. S = site 1 + site 2 + site 3 The total skinfold thickness is a key input into the body-density equation.
Body density An estimate of the density of the body based on the skinfold measurements and age. g/mL The estimated density is then converted into body-fat percentage.
Siri equation A commonly used body-density conversion equation for estimating body-fat percentage. 495 ÷ density − 450 It converts the calculated body density into an estimated percentage of body fat.

1. Measure the three skinfold sites

The method uses three skinfold measurements taken with a skinfold caliper. Men use the chest, abdomen and thigh, while women use the triceps, suprailiac and thigh. Accurate anatomical site selection and consistent measurement technique are important for obtaining a useful estimate.

2. Estimate body density

The three measurements are added together and entered into the sex-specific Jackson-Pollock equation along with age. The equation produces an estimated body-density value rather than directly measuring body fat.

3. Convert density to body fat

The estimated body density is converted into body-fat percentage using the Siri equation. This produces the final estimated body-fat percentage displayed by the calculator.

Male Jackson-Pollock 3-site equation:
Body density = 1.10938 − (0.0008267 × S) + (0.0000016 × S²) − (0.0002574 × age)

Female Jackson-Pollock 3-site equation:
Body density = 1.0994921 − (0.0009929 × S) + (0.0000023 × S²) − (0.0001392 × age)

Where S = the sum of the three skinfold measurements in millimeters.

Body-fat percentage:
(495 ÷ body density) − 450 = estimated body-fat percentage

Skinfold-based body-fat calculations are estimates rather than direct measurements. Results can be affected by measurement technique, anatomical site selection, caliper quality, tester experience and individual differences in fat distribution. This calculator is provided for informational purposes and is not medical or health advice.

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Fitness Calculators
Jackson-Pollock 3-Site Body Fat Percentage Calculator

Jackson-Pollock 3-Site Body Fat Calculator estimates your body-fat percentage from age and three skinfold measurements using the established Jackson-Pollock 3-site body-density equations and the Siri equation. Men use chest, abdomen and thigh measurements, while women use triceps, suprailiac and thigh measurements. Enter your measurements to get an estimated body-fat percentage and understand how the calculation works.

Medical Disclaimer: The calculator results and information provided in this article are for educational and informational purposes only and do not constitute medical, health, or professional advice. Always consult with a qualified healthcare provider before making any decisions related to your health, diet, or fitness goals. Individual results may vary, and this tool should not be used to diagnose or treat any medical condition.

What is A Jackson-Pollock 3-Site Body Fat Calculator?

Jackson-Pollock 3-Site Body Fat Calculator The Jackson-Pollock 3-Site Body Fat Calculator estimates body-fat percentage using age and three skinfold measurements. The calculation first estimates body density with a sex-specific Jackson-Pollock equation and then converts that value into body-fat percentage. It provides an estimate rather than a direct measurement of body fat.

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How accurate is the Jackson-Pollock 3-site method?

The Jackson-Pollock 3-site method can provide a useful estimate when the skinfold measurements are taken correctly and consistently. Accuracy depends heavily on selecting the correct anatomical sites and using proper caliper technique. Individual differences in fat distribution can also cause the estimate to differ from an actual body-fat measurement.

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What skinfolds are used for men?

The male Jackson-Pollock 3-site method uses the chest, abdomen and thigh skinfolds. These three measurements are added together and combined with age in the male-specific body-density equation. The resulting body-density estimate is then converted into body-fat percentage.

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What skinfolds are used for women?

The female Jackson-Pollock 3-site method uses the triceps, suprailiac and thigh skinfolds. These measurements are combined with age using the female-specific Jackson-Pollock equation. The resulting body-density estimate is then converted into an estimated body-fat percentage.

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How do you measure body fat with skinfold calipers?

Skinfold testing involves lifting a fold of subcutaneous tissue and measuring its thickness with a skinfold caliper. The measurement should be taken at the correct anatomical location using a consistent technique. Repeating measurements under similar conditions can make progress tracking more useful.

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Can you use Jackson-Pollock to track body-fat changes?

Jackson-Pollock can be useful for tracking changes over time when measurements are performed consistently. Try to use the same measurement sites, technique, equipment and general testing conditions each time. The trend across repeated measurements is often more useful than treating one individual estimate as an exact body-fat value.

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