Aspire body-composition calculator
Skinfold body-fat calculator.
Choose one validated protocol, enter every site in millimetres and see the body-fat estimate before requesting the full report.
Choose one protocol.
Do not combine sites from different methods. Use marked anatomical locations, research-grade Harpenden calipers and repeated readings.
Free report
Email the equation, measurements and interpretation.
Estimated result:
Retest standard
Repeat with the same protocol, tester, calipers, site markings and pre-test conditions. Compare trends only when the method stays constant.
Evidence
Jackson-Pollock generalised Male equations
Jackson-Pollock-Ward Female equations
Durnin-Womersley four-site equations
Age- and sex-specific body-fat context
Which skinfold protocol should you use?
Jackson-Pollock 3-site: fastest. Male sites are chest, abdomen and thigh; Female sites are triceps, suprailiac and thigh.
Jackson-Pollock 7-site: more measurement sites and more opportunities for tester error, but broader anatomical sampling.
Durnin-Womersley 4-site: biceps, triceps, subscapular and suprailiac, with age- and sex-specific coefficients.
This calculator is informational and does not replace assessment by a qualified health professional.