Journal Impact Factor data is accessible through Web of Science.
The Impact Factor ranks journals within broad subject categories and is based on Web of Science citation data.
✓ Search Web of Science and click on journal title in list of results to find the impact factor and category ranking for the journal.
✓ The Journal Impact Factor (JIF) is the average number of citations to papers in a journal in one year, from articles published in any Thomson Reuters listed journal during the previous two years.
✓ Citation practices vary between disciplines, Journal Impact Factors should not be used to compare journals across different subject areas.
✓ Journal Impact Factors cannot assess the quality of individual articles.
✓ Not all journals have an Impact Factor
Contact an Outreach Librarian for enquiries relating to Journal Impact Factor data
Scopus Journal Metrics are based on citation data from over 20,000 journals from 5,000 publishers.
CiteScore - simple metric for Scopus journals as an alternative to Impact Factor. Includes category ranking and percentile data. Average number of citations to a journal in one year, divided by all items published in that journal in previous 3 years (see sample calculation below)
SCImago Journal Rank (SJR) - measures weighted citations received by a journal based on subject field and prestige of the citing journal. An indicator of 1.00 is average for a journal's subject area. Includes category ranking and quartile data.
Source Normalized Impact per Paper (SNIP) - calculated on actual citations received by journal relative to expected citations for its subject field.