Metrics used for measuring the impact of a document are citation counts, Field-Weighted Citation Impact, Field Citation Ratio and Relative Citation Ratio.
You may use Scopus, Google Scholar and Dimensions to find:
Other library databases, such as EBSCO, ProQuest, Emerald, ACM Digital Library, JSTOR, ScienceDirect, SpringerLink and Ovid, also provide citation information. These database can be used as additional tools for finding citations of your articles.
Field-weighted citation impact (FWCI) is the ratio of an article's citations to the average number of citations received by all similar articles over a three-year window.
Click on the article title to go the full record and view the FWCI:
Scopus uses a Cited reference search to find citations of an article and analyse these citations.
Find how an article has been cited in Scopus:
Watch this online tutorial Using Scopus article metrics, or the YouTube video How to view article metrics in Scopus.
Find how an article has been cited over a range of years:
Field Citation Ratio (FCR): Indicates the relative citation performance of a publication when compared to similarly-aged articles in its subject area. The FCR is calculated for all publications in Dimensions which are at least 2 years old.
Relative Citation Ratio (RCR): indicates the relative citation performance of a publication when comparingwhen compared to other publications in its area of research. A value of more than 1.0 shows a citation rate above average. The RCR is calculated for all PubMed publications in Dimenstions which are at least 2 years old.
IEEE Xplore is a database contains publications in electrical engineering, computer science and electronics. There is a Citation Search option to find out how an article or an author has been cited and the number of times an article has been viewed.