Publish or Perish, from Harzing.com, is a free software program that retrieves citations from Google Scholar and Microsoft Academic Search, then analyzes them to present the following metrics: total number of papers and citations (and various averages), h-index, g-index, contemporary h-index, individual h-indicies, and more.
It's important to note that the same limitations in Google Scholar will carry over when using Publish or Perish. From Harzing.com:
Although Google Scholar performs better than the Web of Science in this respect, it is still not very good in capturing LOTE [languages other than English] articles and citations, or citations in books or book chapters.
As a result, citation metrics in the Social Sciences and even more so in the Humanities will always be underestimated as in these disciplines publications in LOTE and books/book chapters are more likely than in the Sciences.
An author's impact on their field or discipline has traditionally been meausred using the number of times their academic publications are cited by other researchers. There are numerous algorithms that account for such things as the recency of the publication, or poorly or highly cited papers. While citation metrics may reflect the impact of research in a field, there are many potential biases with these measurements and they should be used with care. For a critique of author impact factors, see this article in the Chronicle of Higher Education.
Click on the links to learn more.
From the search results screen in Web of Science, use Create Citation Report (video) to generate author-level metrics, aggregate as well as citations/year (total and per article). You can also generate the Citation Report from a Marked List of records or from your Researcher ID account if you have set that up to build your publications list.
Along with the list of articles and times cited for each, you can get a count of total citations, an h-index, and i10-index (number of publications cited at least 10 times) on an author's Google Scholar profile.