Abstract: In one embodiment, a method for estimating search query precision is provided, the method comprising: receiving a search query, wherein the search query contains one or more terms; retrieving documents from a collection based on the search query, wherein the retrieving includes only retrieving documents that contain all the terms of the search query; creating a query language model based on the retrieved documents; calculating a divergence between the query language model and the collection; and estimating search query precision based on the divergence, wherein the higher the divergence the more precise the search query.