If you are a researcher and publishing, applying for funding or grant money, or you are simply curious, you may wish to know what your "h" index is.  You "h" index is a measure of the impact of your research calculated from your research output.  If for example you have an "h" index of 10, this indicates that from your publication output 10 papers have been cited at least 10 times. The "h" index is commonly determined from publications indexed in the Web of Knowledge and Scopus databases, but now you can receive an "h" index calculation for your papers and publications cited in Google Scholar.  Download this addon from Firefox to automatically display some of the most known citation indices (h-index, g-index, e-index) for citations on Google Scholar. The advanced interface mode allows manual selection of papers, editing of self citations and author count values.  Be aware that your "h" index in Google Scholar is likely to be higher than that calculated by Web of Knowledge or Scopus because of the greater number of citations listed in Google Scholar.