PeerJ Factsheet
A one-page facts and stats PDF, to help when considering journal options with your co-authors.

Impact Factor and Indexing

Indexed means your research gets noticed

Impact Factor

PeerJ's 2016 Impact Factor is 2.2 (see Journal Citation Reports).

Whilst we appreciate the importance still placed on the Impact Factor by many elements of the academic community, we believe that individual research articles are best assessed on their own merits, rather than on an aggregate citation count for the journal in which the work is published. This is why we provide article-level metrics on every article page and also why we periodically publish PeerJ's citation distribution. Our citation distribution as of June 2017 is as follows:

  • 90th percentile: 18.6 citations
  • 75th percentile: 10 citations
  • 50th percentile (median): 5 citations
  • 25th percentile: 2 citations

However, we understand that PeerJ’s inclusion in the Web of Science is very important for the many academics whose research output is still measured by metrics such as the Impact Factor. As an academic publisher closely attuned to the needs of the research community, it would be remiss to ignore the Impact Factor entirely and pretend it does not exist. We hope that alongside this information our article-level metrics, citation distribution and transparent publishing process encourages more scientists to submit their work to PeerJ and benefit from broad readership and high-quality peer review.

Indexed & Discoverable

PeerJ is indexed in all major Abstracting & Indexing databases. The journal is currently indexed by PubMed, PubMed Central, Scopus, Web of Science, Google Scholar, the DOAJ, the ACS databases, EMBASE, CAB Abstracts, Europe PMC, AGORA, ARDI, HINARI, OARE, the ProQuest databases, and OCLC. We also expect to be indexed in services such as MEDLINE.

PeerJ Computer Science is a new journal that started publishing in May 2015. Publications are indexed in Google Scholar, dblp, CiteSeerX, Scopus, DOAJ, the Proquest databases, OCLC, and ScienceOpen. We also expect to be indexed in other locations such as Web of Science, Scopus, ACM Digital Library, Microsoft Academic Search etc.

PeerJ Preprints is the non-peer-reviewed venue covering biology, medicine, and computer science. It is indexed in Google Scholar and each preprint has a unique DOI for citation purposes.

Article Level Metrics

Just as we don’t believe in paywalls blocking access to content, nor do we believe in an author's work not getting the credit it individually deserves, which is why we include article level metrics on all of our article pages. Our article level metrics enable anyone to see the number of visitors, views and downloads an article has received, and also links to the referral source of visitors.

We believe that an individual article should be judged on its own merits, rather than by a metric such as the Impact Factor which aggregates citations across journal articles, therefore we have made it as easy as possible to immediately view the attention an article is getting. No big time lags, and no chasing for links to the coverage - it's all in one place.

Internet Era Discovery

To maximize discovery in the modern Internet era where most people are using general search engines it takes more than just indexing in the traditional academic databases.

To solve that, we've architected the PeerJ website and article pages ourselves with an eye towards implementing modern machine-readable microdata markup and navigation. In non-tech jargon that means major search engines can build rich snippets of information, such as author biographies, that then turn up in search results.