Tool for Journal Metrics:
SJR (SCImago Journal Rank) measures the "average prestige per article" and is based on the idea that not all citations of your work are the same.
- Your articles could be cited in publications of varying prestige
- The subject field, quality, and reputation of the journal in which your publications are cited have a direct effect on the "value" of the citation
Journal Impact Factor measures the frequency with which the average article in a journal has been cited in a particular year or other defined time period using data from Journal Citation Reports (see JCR box on this page)
h-index - refers to how many times at least h articles in a journal publication are cited at least h times each. For example, a publication with five articles cited by, respectively, 17, 9, 6, 3, and 2, has an h-index of 3.
Other tools include: CiteScore (only available through an institutional subscription to Scopus), Eigenfactor and Article Influence Scores (only available through an institutional subscription to Journal Citation Reports)