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Guides & Tutorial, Pao-yue Kong Library, The Polytechnic University of Hong Kong

Journal Impact: Home


Journal Impact measures the average number of articles published and the number of citations the articles received in that journal. It can be used to identify significant journals in a field and it may support publication decisions. Most commonly used metric for measuring a journal is the Impact Factor which is published by Journal Citation Reports (JCR) every year. Some other metrics include SJR and SNIP from Scopus. This guide introduces how these metrics are calculated and how you can make use of them for your research work.

View details on different metrics by clicking on the links below.

Access from InCites Journal Citation Reports
Access from Scopus

Remarks on using Journal Metrics to measure Journal Impact

  • Not all journals can be measured by journal metrics. Only journals indexed by the citation databases have corresponding journal metrics. For example, SJR and SNIP of a journal are available when the title is indexed in Scopus. The Journal Impact Factor (JIF) of a journal is available when the title is covered by the Science Citation Index (SCI) and/or Social Sciences Citation Index (SSCI) of Web of Science.
  • Journal metrics measure the influence and research impact of journals. These measures are predominately based on citation counts.
  • Journal metrics can only be used to measure the research impact of journals and should not be used to measure an author's research influence.