How is impact factor calculated?

Thus, the impact factor of a journal is calculated by dividing the number of current year citations to the source items published in that journal during the previous two years (see Figure 1). All things being equal, the larger the number of previously published articles, the more often a journal will be cited.

What is an average impact factor?

An Impact Factor of 1.0 means that, on average, the articles published one or two year ago have been cited one time. An Impact Factor of 2.5 means that, on average, the articles published one or two year ago have been cited two and a half times.

What is SCI impact factor?

Impact Factor (IF) is a measure reflecting the average number of citations to articles published in science and social science journals.

Which is better SCI or SCIE?

The only difference is the storage media. SCI is only available on CD/DVD format; however, SCIE is available online. A major and only difference is SCI is available on CD/DVD format but SCIE is not.