The increasing use of digital services and technologies in health care calls for effective tools to evaluate the users’ eHealth literacy in order to better understand the users’ interaction with health technologies. We here present a systematic review of existing tools to measure eHealth literacy and for what these tools have been used to investigate. We identified eight tools, of which three of them are bases upon a conceptual model of eHealth literacy and the remaining five are dual tools, . comprised of individual measures for health literacy and digital literacy. Of these eight tools, only one tool (The eHealth literacy Scale - eHEALS) was used in other studies than the one it was originally published in. eHEALS has primarily been used to establish eHealth literacy levels in different populations. | How is eHealth literacy measured and what do the measurements tell us? A systematic review
