Welcome to CWTS Journal Indicators
CWTS Journal Indicators provides free access to bibliometric indicators on scientific journals. The indicators have been calculated by Leiden University’s Centre for Science and Technology Studies (CWTS) based on the Scopus bibliographic database produced by Elsevier. Indicators are available for over 20,000 journals indexed in the Scopus database.
SNIP indicator
A key indicator offered by CWTS Journal Indicators is the SNIP indicator, where SNIP stands for source normalized impact per paper. This indicator measures the average citation impact of the publications of a journal. Unlike the well-known journal impact factor, SNIP corrects for differences in citation practices between scientific fields, thereby allowing for more accurate between-field comparisons of citation impact. CWTS Journal Indicators also provides stability intervals that indicate the reliability of the SNIP value of a journal. More information on the indicators offered by CWTS Journal Indicators is available on the Methodology page.
Most recent update
The most recent update of the indicators offered by CWTS Journal Indicators took place in June 2025.
