The h-index, or Hirsch index, measures the impact of a particular scientist rather than a journal. The index is based on the set of the researcher's most cited papers and the number of citations that they have received in other people's publication. For example, a scholar with an h-index of 5 had published 5 papers, each of which has been cited by others at least 5 times. Washington University Bernard Becker Medical Library has a very helpful video on the h-index.
For more information, see Balaban, AT. 2012. Positive and negative aspects of citation indices and journal impact factors. Scientometrics. DOI: 10.1007/s11192-102-0637-5
The library recommends using these aids to determine the best place to publish your research.
Below are instructions for obtaining your h-index from Web of Science, Scopus and Google Scholar.
Note: the h-index can be different across different databases due to the years covered and the journals in the database.