Journal profile · Physiology
Chronobiology International
ISSN 0742-0528 · eISSN 1525-6073 · Informa Healthcare · UNITED STATES · Bimonthly · Founded 1984
Chronobiology International: CAS Zone 4 · Medicine (2025 upgraded edition); impact factor 2.62; hybrid open access; median 162 days to acceptance (102 articles, last 24 months); community-reported acceptance: fairly easy; 185 articles in 2025; indexed in SCIE and Scopus.
Scope
Aims, scope and focus
Chronobiology International is published by Informa Healthcare and is in Zone 4 of Medicine in the CAS Journal Ranking (2025 upgraded edition). By OpenAlex counts of its recent articles, its largest topics are Circadian rhythm and melatonin, Sleep and related disorders and Sleep and Work-Related Fatigue, together about 52.5% of its articles. Its main subfields are Experimental and Cognitive Psychology. (generated from OpenAlex topic counts and CAS ranking data)
Chronobiology International is the journal of biological and medical rhythm research. It is a transdisciplinary journal focusing on biological rhythm phenomena of all life forms. The journal publishes groundbreaking articles plus authoritative review papers, short communications of work in progress, case studies, and letters to the editor, for example, on genetic and molecular mechanisms of insect, animal and human biological timekeeping, including melatonin and pineal gland rhythms. It also publishes applied topics, for example, shiftwork, chronotypes, and associated personality traits; chronobiology and chronotherapy of sleep, cardiovascular, pulmonary, psychiatric, and other medical conditions. Articles in the journal pertain to basic and applied chronobiology, and to methods, statistics, and instrumentation for biological rhythm study. Read More: http://informahealthcare.com/page/cbi/Description
Source: LetPub
Research area (LetPub): Physiology
Main research topics OpenAlex counts of recent articles; shares are approximate
- Circadian rhythm and melatoninNeuroscience28.6%
- Sleep and related disordersPsychology15.6%
- Sleep and Work-Related FatiguePsychology8.4%
- Sleep and Wakefulness ResearchNeuroscience7.4%
- Dietary Effects on HealthMedicine4.5%
- Spaceflight effects on biologyMedicine4%
- Heart Rate Variability and Autonomic ControlMedicine2.9%
- Psychological and Temporal Perspectives ResearchPsychology2.7%
Rankings & indexing
CAS ranking and database indexing
CAS Journal Ranking
CAS Journal Ranking, upgraded edition (March 2025)Medicine Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Medicine | Zone 4 |
| Minor | Biology | Zone 3 |
| Minor | Physiology | Zone 4 |
Top journal: noReview journal: no
CAS Xinrui Journal Ranking (March 2026)Medicine Zone 3
| Level | Category | Zone |
|---|---|---|
| Major | Medicine | Zone 3 |
| Minor | Biology | Zone 3 |
| Minor | Physiology | Zone 3 |
Top journal: noReview journal: not marked
CAS Journal Ranking, previous upgraded edition (December 2023)Medicine Zone 4
| Level | Category | Zone |
|---|---|---|
| Major | Medicine | Zone 4 |
| Minor | Biology | Zone 3 |
| Minor | Physiology | Zone 4 |
Top journal: noReview journal: no
Database indexing
SCIEScopusLetPub
International journal early-warning lists: not listed in any editionLetPub
Editions, and major and minor categories, are shown separately and never merged into one zone; check which edition your institution uses before you submit or report.
Metrics
Impact metrics and publication volume
Impact
- Impact factor
- 2.62LetPub ·
- CiteScore 2026-06
- 4LetPub ·
- SJR 2026-06
- 0.71LetPub ·
- SNIP 2026-06
- 0.8LetPub ·
- h-index
- 87LetPub ·
- h-index
- 147OpenAlex ·
- i10-index
- 2,689OpenAlex ·
- 2-year mean citedness
- 2.22OpenAlex ·
- Self-citation rate
- 12%LetPub ·
- Share of gold OA articles
- 12.7%LetPub ·
Volume
- Articles per year
- 177LetPub ·
Articles by year OpenAlex count · 4,294 in total · the current year is incomplete
| Year | Articles | Open access | Citations |
|---|---|---|---|
| 2026 | 175 | 36 | 27 |
| 2025 | 185 | 45 | 396 |
| 2024 | 130 | 64 | 665 |
| 2023 | 133 | 68 | 970 |
| 2022 | 121 | 48 | 1,217 |
| 2021 | 188 | 57 | 2,827 |
Sources count differently and were observed at different times, so each source's own value is kept; "publisher" marks figures from the journal's website.
Review & acceptance
Review time and acceptance
Review time from article dates manuscript dates registered with Crossref · to
162 daysMedian, submission to acceptance · P25–P75 120 days – 227 days
- Acceptance to online
- median 13 days (102 articles)
- Submission to online
- median 172 days
- Sample
- 102 articles with submission and acceptance dates (387 in the window); the latest was accepted on
Only articles that were accepted and published are counted, not the time spent on rejected manuscripts, so this usually runs longer than a publisher's "time to first decision".
Other sources
- Average review time (community reports)
- 4–8 weeksLetPub ·
- Average acceptance (community reports)
- Fairly easyLetPub ·
Community reports come from authors' own submissions (confidence 0.5) and are not a promise from the journal; for publisher figures, the journal's own definitions apply.
Fees & open access
APC and open-access policy
Hybrid open accessLetPub
A subscription journal in which authors can pay to publish their article open access.
No source has fee information yet; check the journal's website.
A hybrid journal charges the APC only when the author chooses open access; publishing under the subscription model is usually free.
The journal's website is authoritative for fees; sources were observed at different times and each keeps its own value, without averaging.
Profile
Publication details and official links
- Publisher
- Informa Healthcare
- Country or region
- UNITED STATES
- Language
- English
- Frequency
- Bimonthly
- Founded
- 1984
- ISSN
- 0742-0528
- Electronic ISSN
- 1525-6073
- Official links
- Journal homepage ↗OpenAlex
- Submission system ↗LetPub
FAQ
Frequently asked questions about Chronobiology International
What CAS zone is Chronobiology International in?
In the 2025 upgraded edition of the CAS Journal Ranking, Chronobiology International is in Zone 4 of Medicine, and in Zone 3 of the minor category Biology / Physiology. In the 2026 Xinrui edition it is in Zone 3 of Medicine. Zones from different editions, and from major and minor categories, are not interchangeable.
What is the impact factor of Chronobiology International?
The latest impact factor listed by LetPub is 2.62; CiteScore 4, h-index 147.
How long does peer review take at Chronobiology International?
Based on the dates recorded on 102 articles published between October 2024 and October 2026 (the last 24 months), the median time from submission to acceptance is 162 days (interquartile range 120–227 days); authors report an average review time of 4–8 weeks; the community-reported acceptance is “Fairly easy”. Article statistics cover accepted papers only, publisher figures follow the journal's own definitions, and community reports come from authors' own submissions; none is a promise from the journal.
Which databases index Chronobiology International?
According to LetPub and DOAJ records, Chronobiology International is indexed in SCIE and Scopus.
Is Chronobiology International open access, and what is the APC?
Chronobiology International is a hybrid journal. Fee information is not available yet; check the journal's website.
Sources and updates
The facts on this page come from LetPub, OpenAlex; every figure is tagged with its source and the date it was observed, and conflicting values are kept per source. LetPub source page: view ↗ (archived 2026-08-25). Last updated: .