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Journal Impact Factor
The Journal Impact Factor (JIF) is a journal-level metric calculated from data indexed in the Web of Science Core
Collection. It should be used with careful attention to the many factors that influence citation rates, such as the volume of publication and citations characteristics of the subject area and type of journal. The Journal Impact Factor can complement expert opinion and informed peer review. In the case of academic evaluation for tenure, it is inappropriate to use a journal-level metric as a proxy measure for individual researchers, institutions, or articles. Learn more
Journal Citation Reports
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J C R Y E A R
2021
Favorite
ExportHeliyon
Open Access since 2015
I S S N
N/A
E I S S N
2405-8440
J C R A B B R E V I AT I O N
HELIYON
I S O A B B R E V I AT I O N
Heliyon
Journal information
Publisher information
E D I T I O N
Science Citation Index Expanded (SCIE)
C AT E G O R Y
MULTIDISCIPLINARY SCIENCES - SCIE
L A N G U A G E S
English
R E G I O N
ENGLAND
1 S T E L E C T R O N I C J C R Y E A R
2020
P U B L I S H E R
ELSEVIER SCI LTD
A D D R E S S
THE BOULEVARD, LANGFORD LANE,
KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND
P U B L I C AT I O N F R E Q U E N C Y
1 issue/year
2 0 2 1 J O U R N A L I M PA C T FA C TO R
3.776
View calculation
J O U R N A L I M PA C T FA C TO R W I T H O U T S E L F C I TAT I O N S
3.665
View calculation
Journal Impact Factor contributing items
ExportJournals Categories Pub
My favoritesCitable items (4,559) Citing Sources (4,293)
14
View all years
Journal Impact Factor Trend 2021
ExportJournal Impact Factor
0.000 1.000 2.000 3.000 4.000
0%
25%
50%
75%
100%
JIF Percentile in Category
2017 2018 2019 2020 2021
JCR Years
Journal Impact Factor MULTIDISCIPLINARY SCIENCES - SCIE
View All in Web of Science
Journal Citation Indicator (JCI) 0.72
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The Journal Citation Indicator (JCI) is the average Category Normalized Citation Impact (CNCI) of citable items
(articles & reviews) published by a journal over a recent three year period. The average JCI in a category is 1.
Journals with a JCI of 1.5 have 50% more citation impact than the average in that category. It may be used
alongside other metrics to help you evaluate journals.
Learn more
Total Citations 22,960
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The total number of times that a journal has been cited by all journals included in the database in the JCR year.
Citations to journals listed in JCR are compiled annually from the JCR years combined database, regardless of which JCR edition lists the journal.
The impact of physical activity on
psychological health during Covid-19…
195
Heavy metal pollution in the
environment and their toxicological…
166
Textile finishing dyes and their impact
on aquatic environs
94
Classifications, properties, recent
synthesis and applications of azo dyes
91
COVID-19 pandemic, socioeconomic
crisis and human stress in resource-…
66
Environmental effects of COVID-19
pandemic and potential strategies of…
66
Exploring COVID-19 stress and its
factors in Bangladesh: A perception-…
65
Urban green space cooling effect in
cities
52
Regulation of L-proline biosynthesis,
signal transduction, transport,…
49
Ligninolytic enzymes and its
mechanisms for degradation of…
48
The Citation Distribution shows the frequency with which items published in the year or two years prior were cited in the JCR data year (i.e., the component of the calculation of the JIF). The graph has similar functionality as the JIF Trend graph,
including hover-over data descriptions for each data point, and an interactive legend where each data element's legend can be used as a toggle. You can view Articles, Reviews, or Non-Citable (other) items to the JIF numerator. Learn more
Citation distribution
ExportA R T I C L E C I TAT I O N M E D I A N
2
R E V I E W C I TAT I O N M E D I A N
4
U N L I N K E D C I TAT I O N S
367
Number of items
0 237 475 712 949
1 6 11 16 21 26 31 36 41 46 > 50
Times cited in JCR year
Articles Reviews Other Article Citation Median Review Citation Median
T I M E S C I T E D
0
A R T I C L E S
932
R E V I E W S
37
OT H E R
82
Open Access (OA)
ExportThe data included in this tile summarizes the items published in the journal in the JCR data year and in the previous two years.
For example, in the 2020 JCR data, released in June 2021, the Open Access (OA) data show the publication model (Gold OA or subscription) of materials published in 2018, 2019 and 2020, and citations in 2020 to these items. This three-year set of published items is used to provide descriptive analysis of the content and community of the journal. Learn more
Items
TOTA L C I TA B L E
7,281
% O F C I TA B L E O A
96.46%
Citations*
TOTA L C I TA B L E
18,733
% O F C I TA B L E O A
98.92%
G O L D O P E N A CC E S S
7,023 /
94.79%
S U B S C R I P T I O N A N D F R E E TO R E A D
258 / 3.48%
OT H E R ( N O N C I TA B L E I T E M S )
128 / 1.73%
CITABLENON-CITABLE
94.79%
3.48%
1.73%
*Citations in 2021 to items published in [2019 - 2021]
G O L D O P E N A CC E S S
18,530 /
96.66%
S U B S C R I P T I O N A N D F R E E TO R E A D
203 / 1.06%
OT H E R ( N O N C I TA B L E I T E M S )
9 / 0.05%
U N L I N K E D C I TAT I O N S
429 / 2.24%
CITABLENON-CITABLE
96.66%
1.06%
0.05%
2.24%
Rank by Journal Impact Factor
Journals within a category are sorted in descending order by Journal Impact Factor (JIF) resulting in the Category Ranking below. A separate rank is shown for each category in which the journal is listed in JCR. Data for the most recent year is presented at the top of the list, with other years shown in reverse chronological order. Learn more
E D I T I O N
Science Citation Index Expanded (SCIE)
C AT E G O R Y
MULTIDISCIPLINARY SCIENCES
28/74
J C R Y E A R J I F R A N K J I F Q U A R T I L E J I F P E R C E N T I L E
2021 28/74 Q2 2020 N/A N/A
62.84 N/A
Citation network
C AT E G O R Y
MULTIDISCIPLINARY SCIENCES
38/135
J C R Y E A R J C I R A N K J C I Q U A R T I L E J C I P E R C E N T I L E
2021 38/135 Q2 2020 35/128 Q2 2019 42/126 Q2 2018 39/121 Q2 2017 36/115 Q2
72.22 73.05 67.06 68.18 69.13
2.0 years
The Cited Half-Life is the median age of the items in this journal that were cited in the JCR year. Half of a journal's cited items were published more recently than the cited half-life.
TOTA L N U M B E R O F C I T E S
22,960
N O N S E L F - C I TAT I O N S
22,281
S E L F - C I TAT I O N S
679
Cited Half-life
7.9 years
The Citing Half-Life is the median age of items in other publications cited by this journal in the JCR year.
TOTA L N U M B E R O F C I T E S
144,605
N O N S E L F - C I TAT I O N S
143,926
S E L F - C I TAT I O N S
679
Citing Half-life
Cited Half-life Data Citing Half-life Data
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Journal Citation Relationships
ears
2021 2020 2019 2018 2017
C I T E D Y E A R
# O F C I T E S F R O M 2 0 2 1
C U M U L AT I V E
%
# O F C I T I N G S O U R C E S
All years 22,960 citations 100.00% 5,138 sources
2021 1,957 citations 8.52% 917 sources
2020 9,157 citations 48.41% 2,924 sources
2019 8,057 citations 83.50% 2,671 sources
2018 2,403 citations 93.96% 1,288 sources
2017 837 citations 97.61% 575 sources
Cited Data Citing Data
Top 20 journals citing HELIYON by number of citations
HELIYON: 679
SUSTAINABILITY-BASEL: 345
ENVIRON SCI POLLUT R: 296
MOLECULES: 281
SCI REP-UK: 237 INT J MOL SCI: 205 APPL SCI-BASEL: 202
INT J ENV RES PUB HE: 195 SCI TOTAL ENVIRON: 183 FOODS: 162 MATERIALS: 160 ENERGIES: 152 PLOS ONE: 148 J CLEAN PROD: 142 J MOL STRUCT: 136 CHEMOSPHERE: 133 J MOL LIQ: 128 POLYMERS-BASEL: 128J HAZARD MATER: 117FRONT PSYCHOL: 126
Additional metrics
considers the publications of that journal in the two prior years. Learn more
2,722 total citable items
A R T I C L E S R E V I E W S CO M B I N E D ( C ) OT H E R D O C U M E N T T Y P E S ( O )
P E R C E N TA G E
N U M B E R I N J C R Y E A R 2 0 2 1 ( A )
2,474 248 2,722 39 99%
N U M B E R O F R E F E R E N C E S ( B )
120,576 23,967 144,543 62 100%
R AT I O ( B /A ) 48.7 96.6 53.1 1.6
The Average Journal Impact Factor Percentile takes the sum of the JIF Percentile rank for each category under consideration, then calculates the average of those values.
Learn more
A L L C AT E G O R I E S A V E R A G E
62.84
E D I T I O N
Science Citation Index Expanded
M U LT I D I S C I P L I N A R Y S C I E N C E S
62.84
Contributions by organizations
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Organizations that have contributed the most papers to the journal in the most recent three-year period. Learn more
R A N K O R G A N I Z AT I O N CO U N T
1 EGYPTIAN KNOWLEDGE BANK (EKB)
219
2 CONSEJO
NACIONAL DE INVESTIGACIONES CIENTIFICAS Y TECNICAS (CONICET)
98
3 LANDMARK
UNIVERSITY 79 4 COVENANT
UNIVERSITY 76 5 UNIVERSITY OF
INDONESIA 73
6 JORDAN 62
Contributions by country/region
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Countries or Regions that have contributed the most papers to the journal in the most recent three-year period.
Learn more
R A N K CO U N T R Y / R E G I O N
CO U N T
1 India 732
2 USA 659
3 Nigeria 555
4 Indonesia 403
5 Japan 394
6 Iran 371
7 CHINA
MAINLAND 321
8 Ethiopia 312
9 South Africa 286
Eigenfactor Score
0.02904
Normalized Eigenfactor 6.24328
Article influence score
0.550
14
The Eigenfactor Score is a reflection of the density of the network of citations around the journal using 5 years of cited content as cited by the Current Year. It considers both the number of citations and the source of those citations, so that highly cited sources will influence the network more than less cited
sources. The Eigenfactor calculation does not include journal self-
citations. Learn more
Eigenfactor Score
0.00000 0.00726 0.01452 0.02178 0.02904
2017 2018 2019 2020 2021 JCR Years
The Normalized Eigenfactor Score is the Eigenfactor score
normalized, by rescaling the total number of journals in the JCR each year, so that the average journal has a score of 1. Journals can then be compared and influence
measured by their score relative to 1. Learn more
Normalized Eigenfactor
0.00000 1.56082 3.12164 4.68246 6.24328
2017 2018 2019 2020 2021 JCR Years
The Article Influence Score normalizes the Eigenfactor Score according to the cumulative size of the cited journal across the prior five years. The mean Article Influence Score for each article is 1.00. A score greater than 1.00 indicates that each article in the journal has above- average influence. Learn more
Article Influence Score
0.000 0.138 0.275 0.413 0.550
2017 2018 2019 2020 2021 JCR Years
5 Year Impact Factor
3.752
View Calculation
The 5-year Impact Factor 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.
pact Factor
1.876 2.814 3.752
Immediacy Index
0.719
View Calculation
The Immediacy Index is the count of citations in the current year to the journal that reference content in this same year. Journals that have a consistently high
Immediacy Index attract citations rapidly. Learn more
iacy Index
0.539 0.719
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