Last Updated on July 1, 2026 by Dr. Bhagat
JOURNAL METRICS·Updated June 2026
Journal Impact Factor Ranking guide covers IF, Eigenfactor, h-index, SJR, SNIP and CiteScore metrics. Learn how journals are ranked in JCR 2025, WoS categories, and quartile calculations. Full comparison of ranking methodologies and their limitations.
Journal rankings play a critical role in academic research evaluation, helping researchers identify influential publication venues, guiding libraries in collection development, and informing tenure and promotion committees. This guide explains the most commonly used journal ranking methods and their respective strengths and limitations.
Key Takeaways
- Impact Factor (IF) is the most widely used journal-level metric, calculated as average citations per article over 2 years
- Eigenfactor weights citations by the prestige of the citing journal
- h-index measures both productivity and citation impact at the author or journal level
- SJR (SCImago Journal Rank) is a free, field-normalized alternative to IF
- No single metric fully captures a journal’s quality; use multiple indicators together
RANKING METHODS Four Major Journal Ranking Methods
1. Impact Factor (IF)
The Impact Factor is a metric that measures the average number of citations received in a particular year by articles published in a journal during the two preceding years. Created by Eugene Garfield in the 1960s and now maintained by Clarivate Analytics, the IF is the most widely recognized journal-level metric.
Formula: IF (Year Y) = Citations in Year Y to articles from Years Y-1 and Y-2 ÷ Total citable articles in Years Y-1 and Y-2
Strengths: Simple to understand, widely available (JCR), long historical record (since 1975).
Limitations: Varies by discipline; susceptible to manipulation; ignores citation distribution skew; two-year window may not suit all fields.
2. Eigenfactor Score
Similar to the Impact Factor, the Eigenfactor measures the influence of a journal based on the number of citations it receives. However, the Eigenfactor places more weight on citations from high-impact journals and eliminates self-citations. It is considered a more comprehensive measure of a journal’s total influence.
Strengths: Weights citations by prestige; excludes self-citations; measures total influence.
Limitations: Favors large journals; less intuitive than IF; correlated with IF.
3. h-index
The h-index is a metric for evaluating the cumulative impact of an author’s or journal’s scholarly output. A journal has h-index h if h of its published articles have each received at least h citations. It balances productivity (number of articles) with impact (number of citations).
Strengths: Combines quantity and quality; robust to outliers; applicable to authors, journals, and institutions.
Limitations: Favors established journals; does not distinguish between citation counts above h; field-dependent.
4. SCImago Journal Rank (SJR)
SJR is a prestige metric based on the idea that not all citations are equal. Citations from high-prestige journals carry more weight than those from lower-prestige journals. SJR uses Scopus data and is freely available through the SCImago portal.
Strengths: Free access; weights citations by prestige; field-normalized; three-year citation window.
Limitations: Based on Scopus (smaller than Web of Science); complex calculation; less widely known than IF.
FUNDAMENTALS What Is Journal Impact Factor?
The Journal Impact Factor (JIF) is a scientometric index that reflects the yearly average number of citations that articles published in the last two years in a given journal received. It is frequently used as a proxy for the relative importance of a journal within its field; journals with higher IFs are often deemed more important than those with lower ones.
METHODOLOGY How Is Impact Factor Calculated?
÷
Total citable articles published in (Y-1) + (Y-2)
For example, to calculate the 2025 Impact Factor:
- Count all citations received in 2024 to articles published in 2022 and 2023
- Count the total number of citable articles (research articles and reviews) published in 2022 and 2023
- Divide the citation count by the article count
RANKINGS Top 30 Journals by Impact Factor (JCR 2025)
| Rank | Journal | IF 2025 | Publisher |
|---|---|---|---|
| 1 | Ca-A Cancer Journal for Clinicians | 286.13 | Wiley |
| 2 | MMWR Recommendations and Reports | 196.50 | CDC |
| 3 | New England Journal of Medicine | 56.70 | NEJM Group |
| 4 | Cell | 64.50 | Cell Press |
| 5 | Nature | 50.50 | Springer Nature |
| 6 | Science | 41.85 | AAAS |
| 7 | The Lancet | 80.30 | Elsevier |
| 8 | Nature Reviews Drug Discovery | 62.10 | Springer Nature |
| 9 | Nature Reviews Cancer | 60.40 | Springer Nature |
| 10 | Nature Reviews Clinical Oncology | 45.40 | Springer Nature |
| 11 | Nature Reviews Materials | 47.90 | Springer Nature |
| 12 | Nature Medicine | 45.90 | Springer Nature |
| 13 | JAMA | 51.20 | AMA |
| 14 | Chemical Reviews | 51.40 | ACS |
| 15 | Lancet Oncology | 41.60 | Elsevier |
| 16 | Nature Reviews Immunology | 40.20 | Springer Nature |
| 17 | Nature Reviews Microbiology | 39.90 | Springer Nature |
| 18 | Cancer Cell | 34.30 | Cell Press |
| 19 | Energy & Environmental Science | 32.40 | RSC |
| 20 | Lancet Neurology | 31.30 | Elsevier |
| 21 | Nature Reviews Endocrinology | 31.00 | Springer Nature |
| 22 | Joule | 28.40 | Cell Press |
| 23 | Lancet Infectious Diseases | 27.50 | Elsevier |
| 24 | Advanced Materials | 27.40 | Wiley |
| 25 | Journal of Clinical Oncology | 28.40 | ASCO |
| 26 | Signal Transduction and Targeted Therapy | 28.00 | Springer Nature |
| 27 | Nature Energy | 26.80 | Springer Nature |
| 28 | Nature Nanotechnology | 26.30 | Springer Nature |
| 29 | Nature Genetics | 26.00 | Springer Nature |
| 30 | Immunity | 25.50 | Cell Press |
ANALYSIS Reliability of the Impact Factor
The Impact Factor is a useful but imperfect measure of journal quality. Its reliability depends on several factors:
- Discipline variation: A “good” IF in mathematics (1.5) is very different from a “good” IF in oncology (15+). Cross-field comparisons are misleading.
- Article type: Review articles are cited more frequently than original research, inflating IFs for review-heavy journals.
- Citation distribution: IF is an average; most articles receive fewer citations than the IF suggests.
- Manipulation: Self-citation, citation stacking, and coercive citation can artificially inflate IFs.
- Window size: The 2-year window favors fast-moving fields; slower fields may benefit from the 5-year IF.
GUIDE What Is Considered a High Journal Impact Factor?
There is no universal threshold for a “high” Impact Factor. Context matters:
| Field | Typical IF Range | “High” IF Threshold |
|---|---|---|
| Life Sciences / Biomedicine | 2–10 | 10+ |
| Chemistry | 3–8 | 8+ |
| Physics | 2–6 | 6+ |
| Mathematics | 0.5–2 | 2+ |
| Social Sciences | 1–4 | 4+ |
| Engineering | 2–6 | 6+ |
| Humanities | 0.1–1 | 1+ |
ADVICE Should You Care About Journal Impact Factor?
Journal Impact Factor is one of many factors to consider when choosing where to publish. While it provides a quick snapshot of a journal’s citation performance, it should be used alongside other indicators:
- Scope and audience: Does the journal reach your target readers?
- Peer review quality: Is the editorial process rigorous and constructive?
- Publication speed: How quickly are articles reviewed and published?
- Open access policy: Will your work be freely accessible?
- Indexing: Is the journal indexed in databases your field values (SCIE, Scopus, etc.)?
- Ethical standards: Is the publisher a member of COPE, DOAJ, OASPA?
Many funding agencies and universities now encourage the use of responsible metrics and discourage over-reliance on the Impact Factor alone. The San Francisco Declaration on Research Assessment (DORA) and the Leiden Manifesto are two influential frameworks promoting a more balanced evaluation of research quality.
FAQ Frequently Asked Questions
What are the main journal ranking methods?
The four main methods are: Impact Factor (IF), Eigenfactor Score, h-index, and SCImago Journal Rank (SJR).
What is the Impact Factor?
The Impact Factor measures the average number of citations received in a given year by articles published in the journal during the two preceding years.
How is Impact Factor calculated?
IF = (Citations in Year Y to articles from Years Y-1 and Y-2) ÷ (Total citable articles published in Years Y-1 and Y-2).
What is the difference between IF and Eigenfactor?
IF counts all citations equally; Eigenfactor weights citations by the prestige of the citing journal and excludes self-citations.
What is a good Impact Factor?
It depends on the field. In mathematics, 2+ is excellent; in oncology, 10+ is expected for top journals.
What is SJR?
SJR (SCImago Journal Rank) is a prestige-weighted metric based on Scopus data. It is freely available at scimagojr.com.
Can journals manipulate their Impact Factor?
Yes, through excessive self-citation, citation stacking, or editorial coercion. Clarivate monitors and suppresses journals caught manipulating.
Should I only submit to high-IF journals?
No. Consider scope, audience, review quality, publication speed, and ethical standards alongside Impact Factor.
Where can I find free journal rankings?
SCImago (scimagojr.com) provides free SJR-based rankings. Google Scholar also publishes journal metrics.
Is Impact Factor the best measure of journal quality?
No single metric is perfect. Use IF alongside SJR, CiteScore, h-index, and qualitative assessments of editorial rigor.
SOURCES References & Data Sources
- Journal Citation Reports – Clarivate Analytics. https://jcr.clarivate.com
- SCImago Journal Rank. https://www.scimagojr.com
- Scopus CiteScore – Elsevier. https://www.scopus.com
- Google Scholar Metrics. https://scholar.google.com/citations?view_op=top_venues
- San Francisco Declaration on Research Assessment (DORA). https://sfdora.org
RELATED Related Resources
- Clarivate JCR 2025 Impact Factors Release
- Journal Citation Report Web of Science Guide
- How to Check Journal Impact Factor
