If you are from a research field, you have probably come across two common metrics: CiteScore and Impact Factor. Many researchers, especially PhD scholars and early-career academics, get confused about which one is more important.
Are they the same? Which metric should you trust? Does a higher CiteScore always mean a better journal?
In this article, we explain the differences between CiteScore and Impact Factor in simple language.
What is Impact Factor?
Impact Factor (IF) is one of the most widely recognized journal metrics. It is published every year in the Journal Citation Reports (JCR) by Clarivate. The latest JCR by Clarivate was released on June 17th, 2026.
The Impact Factor measures how often the average article published in a journal is cited over the previous two years. It is calculated using Clarivate’s Web of Science database.
Example
Suppose a journal published:
- 100 papers in 2024
- 100 papers in 2025
In 2026, those 200 papers received 800 citations.
Impact Factor = 800 ÷ 200 = 4.0
This means that, on average, each article was cited four times.
What is CiteScore?
CiteScore is another journal metric published by Elsevier, based on data from the Scopus database. The Latest Scopus CiteScore was released on 5th June 2026.
Unlike Impact Factor, CiteScore looks at citations received over four years.
Example
A journal published:
- 100 papers in 2022
- 100 papers in 2023
- 100 papers in 2024
- 100 papers in 2025
Total publications = 400
In 2026, these papers received 2,000 citations.
CiteScore = 2,000 ÷ 400 = 5.0
This means each document published during the last four years received an average of five citations.
Key Differences Between CiteScore and Impact Factor
| Feature | CiteScore | Impact Factor |
|---|---|---|
| Publisher | Elsevier | Clarivate |
| Database | Scopus | Web of Science |
| Citation Window | 4 Years | 2 Years |
| Released | Every Year | Every Year |
| Coverage | More journals | More selective journals |
| Includes | Most document types | Primarily research articles and reviews |
Top 10 Research Journals with Impact Factor and CiteScore
| S. No. | Journal | Publisher | ISSN | Journal Impact Factor | Scopus CiteScore |
|---|---|---|---|---|---|
| 1 | CA-A CANCER JOURNAL FOR CLINICIANS | WILEY | 1542-4863 | 685.2 | 649.8 |
| 2 | NATURE REVIEWS MOLECULAR CELL BIOLOGY | NATURE PORTFOLIO | 1471-0080 | 118.0 | 165.2 |
| 3 | LANCET | ELSEVIER SCIENCE INC | 1474-547X | 109.0 | 92.4 |
| 4 | NATURE REVIEWS MICROBIOLOGY | NATURE PORTFOLIO | 1740-1534 | 104.6 | 124 |
| 5 | MMWR Surveillance Summaries | CENTERS DISEASE CONTROL & PREVENTION | 1545-8636 | 96.9 | 131.2 |
| 6 | Nature Reviews Clinical Oncology | NATURE PORTFOLIO | 1759-4782 | 94.6 | 126.6 |
| 7 | NATURE REVIEWS DRUG DISCOVERY | NATURE PORTFOLIO | 1474-1784 | 91.2 | 159.2 |
| 8 | NEW ENGLAND JOURNAL OF MEDICINE | MASSACHUSETTS MEDICAL SOC | 1533-4406 | 84.5 | 74.8 |
| 9 | Nature Reviews Materials | NATURE PORTFOLIO | 2058-8437 | 83.3 | 110.6 |
| 10 | Signal Transduction and Targeted Therapy | SPRINGERNATURE | 2059-3635 | 81.2 | 81.6 |
Which Metric should researchers use during journal selection?
Instead of depending upon a single metric, Researchers can evaluate a journal using multiple indicators, including:
- Indexing status
- Impact Factor
- CiteScore
- Journal quartile (Q1–Q4)
- SCImago Journal Rank (SJR)
- Source Normalized Impact per Paper (SNIP)
FAQs
No. They are different metrics calculated using different databases and methodologies.
Many Institutions stress more on the Journal Impact Factor. However, requirements vary by institution and country.
No. Since they use different calculation methods and citation windows.
Yes, provided it is indexed in Scopus and follows strong peer-review and publishing ethics, and fits your research field.