Cost Per Thousand

A CPM a represents the cost of one thousand (1000) impressions. CPM is commonly used in pricing and measuring conventional and online advertising. This page describes the term CPM and lists other pages on the Web where you can find additional information. CPM stands for Cost Per Thousand, the letter M in the abbreviation is the Roman numeral for one thousand. The Cost Per Impression is often measured using the CPM (Cost Per Mille) metric.