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Assessing Impact: Metrics, Altmetrics and Impact Factors: Journal Level Metrics

This guide highlights important metrics used to measure journal impact, author impact and article impact.

Journal Level Metrics

Journal Impact Factors (Clarivate Analytics and Web of Science)

  • Journal Impact Factor is a measure reflecting the yearly average number of citations to recent articles published in that journal.  Published in Journal Citation Reports (JCR) on an annual basis and often found on the websites of the journals. Also listed in the Web of Science database.

TOP Factor 


  • Measures impact of scholarly journals by the broad dissemination of their articles.


  • The average citations per document that a journal title receives over a three-year period.   

SCImago Journal Ranking (SJR) in Elsevier SCOPUS 

  •  Gives weightage to citations from influential journals. 

Source Normalized Impact per Paper (SNIP)

  • Ranking that corrects for the differences in citation practices in different disciplines. 

H5 Index And H5 Median (Google Scholar Metrics)

  • Based on citations collected from the last five years of a journal’s publication history.