5 Year Impact Factor & Ranking

3.6 2.7 1.8 0.9 3.289 2016 2017 2018 2019 2020 3.289 2016 2017 2018 2019 2020
  • 1 286
    #148
  • 1 138
    #73
  • 1 92
    #37
  • 1 162
    #16
  • 1 290
    #165
  • 1 133
    #85
  • 1 92
    #42
  • 1 155
    #16
  • 1 290
    #163
  • 1 137
    #86
  • 1 93
    #43
  • 1 164
    #14
  • 1 288
    #158
  • 1 135
    #81
  • 1 90
    #42
  • 1 163
    #13
  • 1 295
    #179
  • 1 142
    #98
  • 1 93
    #49
  • 1 164
    #14

About 5 Year Impact Factor & Ranking

Impact Factor based on 5 years of history. Copyright Clarivate Analytics.

Metrics

Year I.F. Biochemistry & molecular biology Endocrinology & metabolism Toxicology Zoology
2020 3.289 179/295 98/142 49/93 14/164
2019 158/288 81/135 42/90 13/163
2018 163/290 86/137 43/93 14/164
2017 165/290 85/133 42/92 16/155
2016 148/286 73/138 37/92 16/162

Definition

Impact Factor

A base of five years may be more appropriate for journals in certain fields because the body of citations may not be large enough to make reasonable comparisons, or it may take longer than two years to publish and distribute leading to a longer period before others cite the work.

Actual value is intentionally only displayed for the most recent year. Earlier values are available in the Journal Citation Reports from Clarivate Analytics.

ISI ranking

Journals are often ranked by Impact Factor in an appropriate Clarivate Analytics subject category. As there are now two Impact Factors published – two-year and five-year Impact Factors – this rank may differ, so care is needed when assessing these ranked lists to understand which of the two metrics is being used. In addition, journals can be categorized in multiple subject categories, giving them different ranks for each subject. Consequently, a rank should always be in context to the subject category.