Choosing a professional skinfold caliper involves more than comparing prices. For sports scientists, personal trainers, researchers and educators, the priority is an instrument that supports consistent measurements and can be maintained throughout its working life.
Harpenden Skinfold Calipers are an established option for professional anthropometry. When assessing whether a caliper suits your work, consider its measuring pressure, repeatability, readability and servicing arrangements, alongside the training needed to use it effectively.
Understand what a skinfold caliper measures
A skinfold caliper measures the thickness of a fold of skin and underlying subcutaneous fat at a selected anatomical site. These measurements can then be used in prediction equations to estimate body fat percentage. The instrument itself does not directly measure total body fat.
For example, Durnin and Womersley (1974) developed equations using measurements from the biceps, triceps, subscapular and suprailiac sites. Their research involved 481 men and women aged 16 to 72 years and provided equations differentiated by age and sex.
This distinction matters when purchasing equipment. A clear, finely graduated dial helps you record skinfold thickness, while the resulting body fat estimate also depends on the protocol, equation and quality of the measurements.
Look for specified measuring pressure
Skinfold tissue compresses under pressure, making the caliper’s pressure characteristics an important consideration. Look for a stated specification and a manufacturer that provides guidance on maintaining the instrument.
Harpenden Skinfold Calipers have a nominal measuring pressure of 10 g/mm², described by the manufacturer as constant across the measuring range.
Pressure performance also depends on the condition of the mechanism. Research into caliper calibration identifies the springs, pivot joint, indicator mechanism and jaw alignment as areas requiring attention during servicing (Carlyon et al., 1998).
For buyers, this makes access to ongoing maintenance an important part of the purchasing decision.
Check graduation, repeatability and measuring range
These specifications describe different aspects of an instrument’s performance. They should be considered together when comparing professional calipers.
| Specification | Harpenden specification | What to consider |
| Dial graduation | 0.2 mm | The spacing of the scale divisions |
| Repeatability | 0.2 mm | The instrument’s stated ability to reproduce a reading under the same conditions |
| Measuring range | 0 to 80 mm | The span of thicknesses the instrument can indicate |
A 0.2 mm graduation should not be interpreted as a guarantee that a body fat estimate is accurate to 0.2 percentage points. Skinfold thickness is measured in millimetres; body fat percentage is calculated separately.
When choosing equipment, also consider whether the display is easy to read and whether the caliper feels manageable during your assessment procedure.
How do Harpenden Skinfold Calipers compare with other calipers?
One practical advantage is the finely graduated dial. In a study comparing four caliper models, Harpenden and Holtain measurements were taken to the nearest 0.2 mm, compared with 0.5 mm for Slim Guide and 0.1 mm for the digital Lipowise. Harpenden therefore offers finer measurement increments than Slim Guide, which may be useful when recording small differences in skinfold thickness (Esparza-Ros et al., 2022).
Finer graduations alone do not establish greater overall accuracy. The same study, involving 138 healthy young adults, found that all four models were valid for assessing the adiposity-related variables studied, but concluded that they should not be used interchangeably for comparisons over time (Esparza-Ros et al., 2022).
For a team already using Harpenden Skinfold Calipers, choosing the same model for additional equipment can therefore help maintain consistency in its assessment methods. Their documented specifications and access to manufacturer servicing also make them a practical option for organisations planning regular professional use.
Make calibration and servicing part of the purchase
Before buying a professional caliper, establish how it will be checked, serviced and calibrated. Ask who can carry out this work, what the service includes and how you will record it.
We recommend annual servicing and calibration for the Harpenden Skinfold Caliper. Its service offering includes cleaning, servicing and calibration, with repairs assessed where necessary.
A thickness check block can help check a reading at a known jaw opening, but that alone does not establish whether the spring pressure is performing correctly. Calibration research highlights the importance of assessing pressure and mechanical condition as well as jaw separation (Carlyon et al., 1998).
For organisations carrying out repeated assessments, keeping a service record alongside the instrument’s identification details provides a practical way to manage maintenance.
Choose equipment that supports a consistent protocol
Professional equipment works best alongside trained technique. The manufacturer’s handbook identifies site selection, measurement technique and user experience as factors affecting measurement quality.
Plan how your team will identify anatomical landmarks, take repeat measurements and record results. Follow the requirements of your chosen protocol and use a prediction equation appropriate to the population being assessed.
This is particularly relevant when several practitioners share equipment or when students are learning anthropometric assessment. A common procedure helps make the instrument part of a consistent assessment process.
Harpenden Skinfold Calipers and ISAK practitioners
Harpenden Skinfold Calipers are used by practitioners accredited by the International Society for the Advancement of Kinanthropometry (ISAK). This organisation develops international standards for anthropometric assessment and operates an accreditation scheme focused on measurement quality.
Published research provides examples of this professional use. Hume and Marfell-Jones (2008) used Harpenden calipers in a study in which two ISAK Level 4 practitioners measured eight ISAK-specified skinfold sites. Their findings emphasised the importance of locating and marking measurement sites accurately.
For buyers working within an ISAK-based assessment programme, this provides a relevant example of Harpenden’s use in established anthropometric practice. However, use by ISAK-accredited practitioners does not constitute official endorsement. ISAK states that it does not endorse equipment from any company and instead specifies equipment characteristics in its manual.
Consider protection, care and package contents
A professional caliper may move between laboratories, teaching rooms and assessment venues. Protective storage should therefore be part of the buying decision.
We supply Harpenden Skinfold Calipers in a wooden protective box, with a booklet covering use and body fat calculation. We also offer options with body assessment software. Please note that this software is not compatible with Apple Mac.
Check the contents of your selected package before ordering, including any accessories needed for your workflow.
Careful handling also matters. The manufacturer advises against allowing the caliper to snap shut, as this can damage the indicator mechanism.
Choosing Harpenden Skinfold Calipers for your organisation
The strongest purchasing decision considers the complete assessment process: the instrument’s specifications, the people using it and the arrangements for maintaining it.
Harpenden Skinfold Calipers combine a clearly specified measuring range and dial graduation with access to manufacturer servicing. For organisations planning professional skinfold assessments, these are useful features to assess alongside training, recording procedures and long-term equipment care.
We offer four Harpenden Skinfold Caliper options to suit your assessment requirements:
- Caliper only
- Caliper with measuring tape and calibration check block
- Caliper with software
- Caliper with measuring tape, calibration check block and software
View our full range here.
References
Carlyon, R.G., Bryant, R.W., Gore, C.J. and Walker, R.E. (1998) ‘Apparatus for precision calibration of skinfold calipers’, American Journal of Human Biology, 10(6), pp. 689–697. Available at: https://pubmed.ncbi.nlm.nih.gov/28561406/ (Accessed: 16 October 2026).
Durnin, J.V.G.A. and Womersley, J. (1974) ‘Body fat assessed from total body density and its estimation from skinfold thickness: measurements on 481 men and women aged from 16 to 72 years’, British Journal of Nutrition, 32(1), pp. 77–97. Available at: https://www.cambridge.org/core/journals/british-journal-of-nutrition/article/body-fat-assessed-from-total-body-density-and-its-estimation-from-skinfold-thickness-measurements-on-481-men-and-women-aged-from-16-to-72-years/DAC8BA25856FCEB30E22F60E0AF80D07 (Accessed: 16 October 2026).
Esparza-Ros, F., Moreira, A.C., Vaquero-Cristóbal, R., Barrigas, C., Albaladejo-Saura, M. and Vieira, F. (2022) ‘Differences between four skinfold calipers in the assessment of adipose tissue in young adult healthy population’, Nutrients, 14(10), 2085. Available at: https://pubmed.ncbi.nlm.nih.gov/35631225/ (Accessed: 16 October 2026).
Hume, P. and Marfell-Jones, M. (2008) ‘The importance of accurate site location for skinfold measurement’, Journal of Sports Sciences, 26(12), pp. 1333–1340. Available at: https://pubmed.ncbi.nlm.nih.gov/18821122/ (Accessed: 16 October 2026).
ISAK (n.d.-a) The International Society for the Advancement of Kinanthropometry. Available at: https://www.isak.global/Home/Index (Accessed: 16 October 2026).
ISAK (n.d.-b) Kinanthropometry equipment and software suppliers. Available at: https://isak.global/News?class=active (Accessed: 16 October 2026).