PNAS Article and Journal Metrics

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As a signatory to the San Francisco Declaration on Research Assessment, PNAS is invested in improving the evaluation of scholarly research outputs. We track a range of article and journal metrics, with the goal of providing as rich a view of article and journal performance as possible.

Article Metrics and Authorship

Metrics

PNAS provides several article-level metrics for all articles. Click on the “Info & Metrics” tab of any PNAS article to see its Altmetric score, citation counts, and usage data, including downloads of the abstract, full text, and PDF.

Authorship

PNAS encourages responsible authorship practices and provides information about the specific contributions of each author, which are freely available in an article footnote. Learn more about author requirements in PNAS Editorial and Journal Policies.

2019 Peer Review Metrics

Submission to initial decision: The average time for the Editorial Board’s initial decision (decline without further review) was 8 days.

Submission to first full-review decision: Excluding papers declined by the Board at the initial screening, our average turn time for a full review was 44 days.

Submission to publication: From submission to issue publication was an average of 181 days. Acceptance rate: The acceptance rate for Direct Submissions in 2019 was 14%.

Acceptance rate: The acceptance rate for Direct Submissions in 2019 was 14%.

Journal Metrics

Eigenfactor and Article Influence Metrics

2019 Metrics
Eigenfactor Score	0.93189
Eigenfactor Rank in Multidisciplinary Sciences	6/71
Article Influence Score	4.448

Learn about these metrics and how they are calculated.

Scopus Metrics

2019 Metrics
CiteScore	15.7
CiteScore Percentile	96%
CiteScore Rank in Multidisciplinary Sciences	4/111
SJR	5.165
SNIP	2.689

Learn about CiteScore, SJR, and SNIP metrics and how they are calculated

Journal Impact Factor and Associated Metrics

2019 Metrics
Impact Factor	9.412
Ranking in Multidisciplinary Sciences	8/71
Impact Factor without Self-Cites	9.158
Five-Year Impact Factor	10.620
Total Cites	676,425
Immediacy Index	1.957
Cited Half-Life	10.0

Learn about these metrics and how they are calculated.

Citation distribution

The Journal Impact Factor is a journal-level metric that does not adequately represent the distribution of citations among individual articles in the journal. This chart shows the distribution of 2019 citations to all articles published in PNAS in 2017 and 2018, the two years included in the 2019 Impact Factor. Learn about this distribution chart and how it is generated.

Google Scholar Metrics

2019 Metrics
H5-Index	228
H5-Median	299
Rank in Health and Medical Sciences (General) )	3
Rank in Health & Medical Sciences	4
Rank in Life Sciences & Earth Sciences (General)	676,425
Rank in Life & Earth Sciences	5

Learn about these metrics and how they are calculated.

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