Body Fat Jackson-Pollock 3-Site Caliper Calculator
Estimate body density and subcutaneous adipose percentage via clinical Jackson-Pollock 3-site caliper equations.
Jackson-Pollock 3-Site Skinfold Protocol
The Jackson-Pollock 3-site protocol estimates human body density ($$\text{Db}$$) by evaluating double skinfold thicknesses across targeted anatomical locations.
Siri Equation
% Body Fat = (495 / Body Density) - 450
Frequently Asked Questions
Which side of the body should be measured?
Standardized anthropometry requires taking all caliper skinfold measurements on the anatomical right side of the body.
How many measurements should be taken per site?
Take two to three readings per site and use the mean value to minimize technique variability.
How does age impact skinfold equations?
Internal visceral adipose deposition increases relative to subcutaneous fat with aging, which is adjusted for in the regression models.
Are plastic retail calipers accurate?
High-quality spring-loaded calipers with calibrated jaw pressure (~10 g/mm²) yield reliable results when proper technique is applied.
Calculate in three steps
- 1Enter your valuesUse the fields above and check the units shown beside each input.
- 2Run the calculationSelect Calculate to refresh the result with your latest values.
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