Jackson–Pollock 7-Site Skinfold Calculator
The full seven-fold research protocol (both sexes) — maximum tape-free accuracy outside a lab.
Seven sites smooth out individual fat-distribution quirks that can bias 3-site protocols by a couple of points. The trade-off is technique: each extra site is an extra chance for tester error, so this protocol rewards practice and a quality caliper — used widely in exercise-physiology research.
Formula
For general information only — not medical or training advice. Estimates vary between individuals; consult a qualified professional before changing your exercise or nutrition routine.
The full seven-fold research protocol (both sexes) — maximum tape-free accuracy outside a lab. The Jackson–Pollock 7-Site Skinfold Calculator is a free, private 7 site skinfold tool — every result computes instantly in your browser with no sign-up and no data upload.
About Jackson–Pollock 7-Site Skinfold Calculator
Seven sites smooth out individual fat-distribution quirks that can bias 3-site protocols by a couple of points. It applies D = a − b·ΣS₇ + c·ΣS₇² − d·age (sex-specific); BF% = 495/D − 450. Use the Jackson–Pollock 7-Site Skinfold Calculator to get an instant, clearly-explained result with the working shown step by step — free, private and with the source method cited.
How to use Jackson–Pollock 7-Site Skinfold Calculator
- 1Enter your details in the Jackson–Pollock 7-Site Skinfold Calculator input fields above.
- 2The result updates instantly with the working and reference bands shown.
- 3Adjust any value to explore how it changes the outcome — it's free and unlimited.
Why use Jackson–Pollock 7-Site Skinfold Calculator?
- ✓Instant 7 site skinfold result that recomputes as you type — no waiting, no page reloads
- ✓100% client-side: your health data never leaves your browser
- ✓Shows the actual formula and your numbers substituted in, so you can see exactly how the result is reached
- ✓Based on published, citable sources (Jackson AS & Pollock ML, Br J Nutr 1978)
- ✓Free forever with no sign-up, account or app install
Frequently asked questions
How does the Jackson–Pollock 7-Site Skinfold Calculator work?+
Seven sites smooth out individual fat-distribution quirks that can bias 3-site protocols by a couple of points. The calculation uses the formula: D = a − b·ΣS₇ + c·ΣS₇² − d·age (sex-specific); BF% = 495/D − 450. Everything runs instantly in your browser as you type — your inputs are never uploaded.
Is the Jackson–Pollock 7-Site Skinfold Calculator accurate, and what is it based on?+
The method is traceable to authoritative sources, including Jackson AS & Pollock ML, Br J Nutr 1978; Jackson, Pollock & Ward, Med Sci Sports Exerc 1980. Results are estimates — individual variation always applies, so treat the output as a well-grounded starting point.
Is the Jackson–Pollock 7-Site Skinfold Calculator free and private?+
Yes. It's completely free with no sign-up, and all computation happens locally in your browser, so none of your health data ever leaves your device.
Can I use this for medical decisions?+
This tool is for general fitness information only, not medical or training advice. Consult a professional before changing your routine.
What can I use the Jackson–Pollock 7-Site Skinfold Calculator for?+
It's commonly used for 7 site skinfold, jackson pollock 7, skinfold protocol. The full seven-fold research protocol (both sexes) — maximum tape-free accuracy outside a lab.
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