Journal impact factor
Journal impact factor (JIF) or Impact factor (IF) is the widely quoted journal metric. Impact factor is calculated in a two year window. Journals indexed by Web of Science may provide JIF details on their websites.
Journal Citation Indicator
The Journal Citation Indicator (JCI) is a new metric created by Clarivate. JCI is the average Category Normalized Citation Impact (CNCI) of citable items (articles & reviews) published by a journal over a recent three year period. The average JCI in a category is 1. A journal with a JCI 1.5 means that this journal has 50% more citation impact than the average in the same category.
CiteScore
CiteScore: a journal metric created by Scopus in 2016. CiteScore is based on the number of citations to documents (articles, reviews, conference papers, book chapters, and data papers) by a journal over four years, divided by the number of the same document types indexed in Scopus and published in those same four years.
SCImago Journal Rank (SJR)
SJR is a prestige metric weighted by the prestige of a journal. Citations are weighted depending on where they come from. The number of citations received and the importance or prestige of the journals where such citations come from are used for measuring the influence of the journal. A citation from a high SJR jouranl has more value than a citation from a lower SJR journal. Subject field, quality and reputation of the journal have a direct effect on the value of a citation. SJR normalises differences of citation behaviour in different subjects. SJR uses Scopus’ citation data in its calculations
SNIP
SNIP (Source Normalized Impact per Paper) measures contextual citation impact by weighting citations based on the total number of citations in a subject field. SNIP is the ratio of a source’s average citation count per paper, and the ‘citation potential’ of its subject field. It aims to allow direct comparison of sources in different subject fields. SNIP is also based on Scopus’ data.