Harpenden Skinfold Caliper

What the results tell you

Harpenden measures skinfold thickness in millimetres. Body-fat percentage is calculated from several sites using a selected protocol and equation. The manufacturer cites four-site Durnin–Womersley and three- or seven-site Jackson–Pollock approaches. A 0–80 mm range and 0.2 mm graduation describe the instrument, not the accuracy of the resulting fat percentage. Skinfold sums can also be tracked without conversion when the protocol stays consistent.

How the test works

The operator identifies protocol sites, lifts a skinfold and measures its thickness with the caliper. Repeat readings support quality control and calculation. This is anthropometry without electrodes or X-rays. An equation converts the sites into a composition estimate for a particular population; changing sites or equation can change the percentage.

When the test is useful

Skinfolds offer an accessible way to track subcutaneous-fat changes. Individual site readings and sums are useful records. Value depends on operator skill and consistent protocol. Water compartments, bone density and direct strength testing require other appropriate methods; the caliper does not provide them.

Preparing for your visit

Ask which sites are measured and wear clothing allowing access while preserving privacy. Plan follow-up under similar conditions and preferably with the same operator. Discuss sensitive skin and sites where a fold cannot safely be taken. Confirm that you receive site millimetres, sums and the equation used.

Reading results and understanding limitations

The caliper measures a subcutaneous fold rather than all internal fat. Site selection, fold technique, operator and equation suitability affect estimates. Dial graduation does not guarantee whole-body percentage accuracy. Different protocols cannot automatically form one trend. The instrument does not directly assess visceral fat, hydration, muscle strength or bone density.

Choosing a testing location

Ask about operator experience, site count and names, and the equation used. Retain millimetres, skinfold sums and protocol as well as any calculated fat percentage.

Specifications: Harpenden Skinfold Caliper

Method

Anthropometry — skinfolds

Measurement range

0–80 mm

Dial graduation

0.2 mm

Documented outputs

Skinfold thickness; fat percentage after calculation

Where to get tested

Locations with a documented device. Each location detail describes its service and conditions.

Frequently asked questions