Impact Factor Calculator
Estimate a journal’s impact factor from citation counts and the number of citable articles it published in the two preceding years.
What the journal impact factor measures
The Journal Impact Factor (JIF) is a widely used bibliometric that estimates how frequently a journal’s recent articles are cited. For a given year, it is calculated as the number of citations that year to articles published in the two preceding years, divided by the total number of citable articles (research articles and reviews) published in those same two years.
How this calculator works
Enter how many citations the current year received to articles from each of the two prior years, and how many citable articles were published in each of those years. The calculator sums the citations, sums the citable articles, and divides citations by articles to produce the impact factor.
- A higher number means articles from that journal are, on average, cited more often.
- Impact factor is influenced by field norms, article type mix, and self-citation, so it should not be used as the sole measure of research quality.
This tool is for general educational and planning purposes and reproduces the standard published formula; actual official values are calculated and published by Clarivate using their full citation database.