Enter the number of citations received in the current year and the number of articles published in each of the two preceding years — the Impact Factor Calculator computes your journal's Impact Factor (IF) following the standard bibliometric formula. You'll also see a visual breakdown of how citations compare to total citable publications.
Impact Factor (IF)
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Total Citable Articles (Y−1 + Y−2)
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Citations per Article (Y−1)
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Citations per Article (Y−2)
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The Impact Factor (IF) is a bibliometric index that reflects the average number of citations received per citable article published by a journal over the previous two years. It is widely used to evaluate the relative importance or influence of a scientific journal within its field.
The formula is: IF = (Citations in year Y) ÷ (Articles published in Y−1 + Articles published in Y−2). For example, if a journal received 98 citations in 2024 and published 36 articles in 2023 and 38 in 2022, its IF = 98 ÷ (36 + 38) = 1.324.
If the journal published a total of 75 articles across the two prior years and received 67 citations in the current year, the Impact Factor would be 67 ÷ 75 ≈ 0.893. You can confirm this instantly using the calculator above.
Researchers, institutions, and funding bodies use the Impact Factor to compare journals, decide where to submit manuscripts, assess research output, and sometimes evaluate grant applications. A higher IF generally signals a more influential journal in its discipline, though it should not be used in isolation.
The most authoritative source is Clarivate's Journal Citation Reports (JCR), which is updated annually. Scopus provides a similar metric called CiteScore. Many university library portals also provide access to IF data through these databases.
The IF can be misleading because it varies significantly across disciplines — a high IF in one field may be considered low in another. It can also be skewed by highly cited review articles, does not account for self-citations, and does not measure individual article or author quality directly.
There is no universal threshold, as acceptable IF values differ by field. In many natural sciences, an IF above 3–5 is considered solid, while top journals like Nature and Science exceed 40. In humanities or niche fields, an IF of 1–2 may be excellent. Always compare within the same discipline.
The Impact Factor measures journal-level influence based on citations per article over two years, whereas the H-Index measures an individual author's productivity and citation impact. An author has an H-Index of h if h of their papers have each been cited at least h times. They are complementary but distinct metrics.