Methods, apparatus, and articles of manufacture to measure search results are disclosed. An example method includes processing a search query to return a listing of search results including a first search result and a second search result; and ordering the first search result and the second search result based on a first preview metric associated with the first search result and a second preview metric associated with the second search result, the first preview metric including a first ratio based on a first count of preview events for the first search result and a second count of impressions of the first search result in the search query, the second preview metric including a second ratio based on a third count of preview events for the second search result and a fourth count of impressions of the second search result in the search query.