scientific reports impact factor

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The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values.

The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. It is based on the idea that 'all citations are not created equal'. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.

Evolution of the number of published documents. All types of documents are considered, including citable and non citable documents.

This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.

Evolution of the total number of citations and journal's self-citations received by a journal's published documents during the three previous years. Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.

Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal's published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.

International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal's documents signed by researchers from more than one country; that is including more than one country address.

Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.

Ratio of a journal's items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.

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Journal Metrics

This page provides information on peer review performance and citation metrics for the Nature Portfolio journals. Data are collected annually for full calendar years. Click here to download our quick reference guide to journal metrics.

On this page

2023 peer review metrics, 2022 journal metrics, definitions, editorials and other content.

Submission to first editorial decision: the median time (in days) from when a submission is received to when a first editorial decision about whether the paper was sent out for formal review or not is sent to the authors.

Submission to Accept: the median time (in days) from the published submission date to the final editorial acceptance date.

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On this page you will find a suite of citation-based metrics for Nature Portfolio journals, produced by Clarivate Analytics. Brief definitions for each of the metrics used to measure the influence of our journals are included below the tables . Article-level metrics are also available on each article page, allowing readers to track the reach of individual papers.

Commentaries on Impact Factors and their use and misuse can be found in our editorials and other content, going back for many years, links to a sample of which are provided at the end of the page .

For recently launched journals, metrics are calculated from available citation data. If a metric uses multiple years of data, new journals may have partial metrics.

While the metrics presented here are not intended to be a definitive list, we hope that they will prove to be informative. The page is updated on an annual basis.

2-year Impact Factor:

The Journal Impact Factor is defined as all citations to the journal in the current JCR year to items published in the previous two years, divided by the total number of scholarly items (these comprise articles, reviews, and proceedings papers) published in the journal in the previous two years. (Courtesy of Clarivate Analytics )

5-year Impact Factor:

The 5-year journal Impact Factor, available from 2007 onward, is the average number of times articles from the journal published in the past five years have been cited in the JCR year. It is calculated by dividing the number of citations in the JCR year by the total number of articles published in the five previous years. (Courtesy of Clarivate Analytics )

Immediacy index:

The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. (Courtesy of Clarivate Analytics )

Eigenfactor® Score:

The Eigenfactor Score calculation is based on the number of times articles from the journal published in the past five years have been cited in the JCR year, but it also considers which journals have contributed these citations so that highly cited journals will influence the network more than lesser cited journals. References from one article in a journal to another article from the same journal are removed, so that Eigenfactor Scores are not influenced by journal self-citation. (Courtesy of Clarivate Analytics )

Article Influence Score:

The Article Influence Score determines the average influence of a journal's articles over the first five years after publication. It is calculated by multiplying the Eigenfactor Score by 0.01 and dividing by the number of articles in the journal, normalized as a fraction of all articles in all publications. This measure is roughly analogous to the 5-Year Journal Impact Factor in that it is a ratio of a journal's citation influence to the size of the journal's article contribution over a period of five years. (Courtesy of Clarivate Analytics )

• Nature and the Nature journals are diversifying their presentation of performance indicators. Nature . Time to remodel the journal impact factor , July 2016
• The journal impact factor is a much-criticized yet still-used number. As with any metric, it should not be used uncritically and without an understanding of what it measures. Nature Methods . On Impact , August 2015.
• Use these ten principles to guide research evaluation, urge Diana Hicks, Paul Wouters and colleagues. Nature . Bibliometrics: The Leiden Manifesto for research metrics , 22 April 2015.
• The San Francisco Declaration on Research Assessment (DORA), an initiative spearheaded by the American Society for Cell Biology, aims to reform research assessment. Nature Cell Biology . Ending the tyranny of the impact factor , January 2014.
• In deciding how to judge the impact of research, evaluators must take into account the effects of emphasizing particular measures — and be open about their methods. Nature . The maze of impact metrics , 17 October 2013.
• As the journal's first impact factor is released, it is time to reflect on journal metrics and how Nature Climate Change has been making its mark. Nature Climate Change . Having an impact , July 2013.
• Citation analyses can condense scholarly output into numbers, but they do not live up to peer review in the evaluation of scientists. Online usage statistics and commenting could soon enable a more refined assessment of scientific impact. Nature Materials . Measuring impact , July 2011.
• The classic impact factor is outmoded. Is there an alternative for assessing both a researcher's productivity and a journal's quality? Nature Immunology . Ball and chain , October 2010.
• Nature Metrics special , June 2010. The value of scientific output is often measured, to rank one nation against another, allocate funds between universities, or even grant or deny tenure. Scientometricians have devised a multitude of 'metrics' to help in these rankings. Do they work? Are they fair? Are they over-used? Nature investigates.
• Transparency, education and communication are key to ensuring that appropriate metrics are used to measure individual scientific achievement. Nature . Assessing Assessment , 17 June 2010.
• Research assessment rests too heavily on the inflated status of the impact factor. Nature . Not-so-deep impact , 23 June 2005.

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