How we estimate daily search volume

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Here is the formula we use to estimate daily search volume for any given keyword:

					

						

							
Number of searches
for a keyword
in our database
----------------------
Total number of
searches in our
database
							



 x 
							

Estimated total number of
daily searches on all search
engines*
							



 = 
							

Estimated daily
volume of searches
for the keyword
						
					
					

So for a keyword that has been searched for 9,000 times in our database (over our sample for the last 160 days), this is the number of daily searches that we predict for that keyword:

* Every day, on average, we collect about 1.7 million search terms from Dogpile.com and Metacrawler.com (accounts for 0.63% of searches across all engines). By combining these two figures, we estimate that the total daily searches across all engines is 279.5 million searches.