SCI Journal

Impact Factor Database

Proceedings of the National Academy of Sciences of the United States of America

Impact Factor

9.412

H Index

771

Impact Factor

10.397

Proceedings of the National Academy of Sciences of the United States of America

Basic Journal Info

Country

United States
Journal ISSN: 00278424, 10916490
Publisher: National Academy of Sciences
History: 1949-1951, 1961-ongoing
Journal Hompage: Link
How to Get Published:

Research Categories

Proceedings of the National Academy of Sciences of the United States of America
2020 Impact Factor by Web of Science

Index

SCIE/SSCI

Impact Factor

9.412

by WOS

Ranking

346

by WOS

Proceedings of the National Academy of Sciences of the United States of America
2020 SJR, SJR Impact Factor and H Index

H Index

771

SJR

5.011

Scopus Impact Factor

10.397

Proceedings of the National Academy of Sciences of the United States of America
2020 SJR Impact Factor 2-year, 3-year, 4-year

2-year
Impact Factor

9.566

3-year
Impact Factor

10.02

4-year
Impact Factor

10.397

Scope/Description:

PNAS is one of the world"s most-cited multidisciplinary scientific serials. Since its establishment in 1914, it continues to publish cutting-edge research reports, commentaries, reviews, perspectives, colloquium papers, and actions of the Academy. Coverage in PNAS spans the biological, physical, and social sciences. PNAS is published weekly in print, and daily online in PNAS Early Edition. The PNAS impact factor is 9.38 and the Eigenfactor is 1.7 for 2008. PNAS is available by subscription.

Proceedings of the National Academy of Sciences of the United States of America
Scopus 2-Year Impact Factor Trend

Note: impact factor data for reference only

Proceedings of the National Academy of Sciences of the United States of America
Scopus 3-Year Impact Factor Trend

Note: impact factor data for reference only

Proceedings of the National Academy of Sciences of the United States of America
Scopus 4-Year Impact Factor Trend

Note: impact factor data for reference only

Impact Factor

The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric factor based on the yearly average number of citations on articles published by a particular journal in the last two years. In other words, the impact factor of 2020 is the average of the number of cited publications divided by the citable publications of a journal. A journal impact factor is frequently used as a proxy for the relative importance of a journal within its field. Normally, journals with higher impact factors are often deemed to have more influence than those with lower ones. However, the science community has also noted that review articles typically are more citable than research articles.

Find out more: What is a good impact factor?
And check out: How to get published in a top science journal?

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Proceedings of the National Academy of Sciences of the United States of America
SCR Journal Impact Factor History

  • 2020 Impact Factor 9.566
  • 2019 Impact Factor 9.351
  • 2018 Impact Factor 9.553
  • 2017 Impact Factor 10.028
  • 2016 Impact Factor 10.467
  • 2015 Impact Factor 10.678
  • 2014 Impact Factor 10.896
  • 2013 Impact Factor 11.208
  • 2012 Impact Factor 11.234
  • 2011 Impact Factor 10.975
  • 2010 Impact Factor 10.758
  • 2009 Impact Factor 10.433
  • 2008 Impact Factor 10.293
  • 2007 Impact Factor 10.641
  • 2006 Impact Factor 10.677
  • 2005 Impact Factor 11.117
  • 2004 Impact Factor 11.012
  • 2003 Impact Factor 10.702
  • 2002 Impact Factor 11.119
  • 2001 Impact Factor 11.017
  • 2000 Impact Factor 10.774
Note: impact factor data for reference only

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Other Journal Impact Indicator

Any journal impact factor or scientometric indicator alone will not give you the full picture of a science journal. That’s why every year, scholars review current metrics to improve upon them and sometimes come up with new ones. There are also other factors to sider for example, H-Index, Self-Citation Ratio, SJR (SCImago Journal Rank Indicator) and SNIP (Source Normalized Impact per Paper). Researchers may also consider the practical aspect of a journal such as publication fees, acceptance rate, review speed.

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Proceedings of the National Academy of Sciences of the United States of America

H-Index

The h-index is an author-level metric that attempts to measure both the productivity and citation impact of the publications of a scientist or scholar. The index is based on the set of the scientist's most cited papers and the number of citations that they have received in other publications

771

Proceedings of the National Academy of Sciences of the United States of America

SCImago Journal Rank (SJR)

SCImago Journal Rank (SJR indicator) is a measure of scientific influence of scholarly 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.

5.011