What is CPM and How Do You Calculate It?

Understanding CPMs When purchasing a planned media buy, a term that you will encounter often is “CPM.”  Those unfamiliar with the CPM model sometimes mistakenly think that the “M” in “CPM” stands for “million”  while in reality the “M” stands for the Roman numeral for “thousand” (1,000).  So “CPM” literally means “Cost per thousand.” Calculating CPMs When calculating CPMs there are three numbers that you will continually use: Total number of impressions The CPM itself...