9.580 0.80%
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PNAS - Impact Factor
The Impact Factor 2018 of PNAS is 9.580, which is just updated in 2019. Compared with historical Impact Factor data, the Impact Factor 2018 of PNAS grew by 0.80% . The Impact Factor Quartile of PNAS is Q1. The Impact Factor (IF) or Journal Impact Factor (JIF) of an academic journal is a scientometric index that reflects the yearly average number of citations that recent articles published 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 impact factors are often deemed to be more important than those with lower ones. The Impact Factor measures the average number of citations received in a particular year (2018) by papers published in the journal during the two preceding years (2016-2017). Note that 2018 impact factors are reported in 2019; they cannot be calculated until all of the 2018 publications have been processed by the indexing agency. Besides, 88% scientific research articles published by PNAS have received at least 1 citation in 2018. In addition to the 2-year Impact Factor, the 3-year Impact Factor and 5-year Impact Factor can provide further insights into the impact of PNAS.
