SCImago journal rankings (SJR) rank journals that are indexed in the Scopus Database. SJR measures the scientific influence of these scholarly journals, taking into account the number of citations received by a journal and the prestige of the journals where citations appear.

For more information on SJR please see Research Impact: Journal ranking

Scopus Journal Analyzer can be used to compare up to 10 journals indexed in the Scopus database.

For information on how Scopus compares journals please see: Scopus Support Center

Google Scholar Metrics lists the top 100 journals in subject categories, these are ranked using the journal h-index.

For more information on the h-index please see: Research Impact: Author impact

For more information on Google Scholar Metrics please see: Google Scholar Metrics

The Web of Science Database can be used to find the category and quartile impact factor rank of some journals. Quartile rankings are derived from journal impact factor data and journals are ranked within a subject category. Quartile 1 (Q1) is applied to the top 25% ranking journals in a particular subject category. Quartile 2 (Q2) is applied to journals whose rankings place them in the next 25%-50%, Quartile 3(Q3) is applied to those journals whose rankings place them in the 50%-75% distribution and Quartile 4 (Q4), the lowest position, is applied to those journals whose rankings place them in the bottom 25% distribution. 

To find a quartile ranking:

• Go to the Web of Science Database
• Change the search criteria from Topic to Publication Name

• Type the name of your journal into the search box and click on Search
• From the search results select one article by clicking the title

• On the article's detail page click the View Journal Impact link

• A dialogue box will open containing information about the journal, including the journal's category and it's quartile ranking

In our example above, the Aquatic Sciences journal is ranked quartile 1 (Q1), the top quartile ranking, in the subject categories for Environmental Sciences, Limnology and Marine & Freshwater Biology.