Journal Metrics Explained: h-index, Impact Factor & Citations
Journal metrics measure how much a journal's research is used and cited. The most important are the h-index (impact and productivity combined), the impact factor (average citations per recent article), the i10-index (articles with 10+ citations) and total citation count.
What is the h-index of a journal?
The h-index is the largest number h such that the journal has published h articles that have each been cited at least h times. It rewards journals that consistently publish influential work rather than a single highly cited paper. For example, Nature has an h-index above 1,800.
What is a journal impact factor?
The impact factor is the average number of citations received in a year by articles published in the journal during the previous two years. Scinovex shows a comparable 2-year mean citedness indicator on every journal profile so you can compare journals fairly.
What is a good h-index for a journal?
- Above 300: world-leading journals (Nature, Science, The Lancet).
- 100–300: highly respected, well-established journals in their field.
- 50–100: solid, reputable specialist journals.
- Below 50: newer or niche journals — still valuable, especially in emerging fields.
What is the i10-index?
The i10-index counts how many of a journal's articles have received at least 10 citations. It is a simple, transparent way to gauge the breadth of a journal's useful output.
How can I compare journal metrics?
Use the Scinovex journal comparison tool to place up to three journals side by side across h-index, impact, citations and publication trends, or browse the full journal directory ranked by any metric.
Frequently asked questions
Is a higher h-index always better?
A higher h-index generally means greater citation impact, but always compare journals within the same field — citation rates differ widely between disciplines like medicine and mathematics.
Where do these metrics come from?
Scinovex computes metrics from a comprehensive index of scholarly publications and their citation records, updated regularly.