{"id":205,"count":0,"description":"","link":"https:\/\/tenjin.com\/zh\/glossary\/effective-cost-per-mille-1000-ecpm\/","name":"Effective Cost Per Mille (eCPM)","slug":"effective-cost-per-mille-1000-ecpm","taxonomy":"glossaries","parent":0,"meta":{"status":["1","1"],"order":["0","0"],"glossary_term_description":["
\r\n\r\nDefinition:<\/strong>\r\n\r\neCPM (effective cost per mille)<\/strong> is a mobile advertising metric that measures the revenue earned per 1,000 ad impressions. It is used by app publishers and developers to evaluate and compare ad monetization performance across networks, formats, and pricing models.<\/span>\r\n\r\n \r\n\r\nFormula:<\/b>\u00a0<\/span>\r\n
eCPM = (Total Ad Revenue \/ Total Impressions) \u00d7 1,000<\/pre>\r\n<\/div>\r\n\r\n
eCPM Meaning: What is eCPM?<\/b><\/h2>\r\neCPM stands for effective cost per mille. In Latin, \"Mille\", is the word for one thousand. So essentially, eCPM measures how much revenue your app generates for every 1,000 ad impressions served.<\/span>\r\n\r\nThe \"effective\" prefix makes this metric useful and different. Unlike its relative <\/span>CPM<\/span><\/a>, eCPM is calculated using actual revenue data after impressions are served. This makes it one of the most reliable signals available to publishers who monetize by showing ads or <\/span>in-app advertising (IAA)<\/span><\/a> monetization models.\u00a0<\/span>\r\n\r\nIn simple terms, the eCPM tells you how well your ad inventory is performing. Two apps with identical impression volumes can generate very different revenues depending on their ad networks, formats, audience quality, and geography. The eCPM is what surfaces that difference.<\/span>\r\n\r\nExample:<\/b> A casual game serves 500,000 impressions in a month and earns $1,500 in ad revenue. Its eCPM is $3.00. A puzzle app serves the same number of impressions but earns $4,000, giving it an eCPM of $8.00. Same impression volume, very different monetization results.<\/span>\r\n
Calculation of eCPM: Formula<\/b><\/h2>\r\nAt its core, eCPM is calculated by dividing total ad revenue by total impressions, then multiplying by 1,000:<\/span>\r\n
eCPM = (Total Ad Revenue \/ Total Impressions) \u00d7 1,000\r\n\r\n<\/pre>\r\nExample:<\/b> A hyper-casual game earns $800 from 400,000 impressions in a week.<\/span>\r\n\r\neCPM = (800 \/ 400,000) \u00d7 1,000 = <\/span>$2.00<\/b>\r\n\r\nThat $2.00 figure is your eCPM for that period. It is a clean, comparable number you can track over time, benchmark against other networks, and use to guide monetization decisions.<\/span>\r\n\r\n\r\n\r\n\r\n
eCPM vs CPM: What's the Difference?<\/b><\/h2>\r\nThis difference can sometimes be confusing in mobile advertising. Let\u2019s clarify and distinguish between the two metrics: <\/span>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
<\/td>\r\nCPM<\/b><\/td>\r\neCPM<\/b><\/td>\r\n<\/tr>\r\n
Stands for<\/b><\/td>\r\nCost per mille<\/span><\/td>\r\nEffective cost per mille\u00a0<\/span><\/td>\r\n<\/tr>\r\n
Set by<\/b><\/td>\r\nAdvertiser (pre-campaign)<\/span><\/td>\r\nCalculated from actual results<\/span><\/td>\r\n<\/tr>\r\n
Used by<\/b><\/td>\r\nAdvertisers buying impressions<\/span><\/td>\r\nPublishers measuring revenue<\/span><\/td>\r\n<\/tr>\r\n
Timing<\/b><\/td>\r\nBefore the campaign runs<\/span><\/td>\r\nAfter impressions are served<\/span><\/td>\r\n<\/tr>\r\n
Purpose<\/b><\/td>\r\nPricing model<\/span><\/td>\r\nPerformance benchmark<\/span><\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\nCPM<\/b> is a buying metric. Advertisers use it to set what they're willing to pay per thousand impressions.<\/span>\r\n\r\neCPM<\/b> is an earnings metric. Publishers and developers use it to understand what they actually made \u2014 across any ad format or pricing model, including CPC, CPI, or CPA campaigns.<\/span>\r\n\r\nIn short: CPM is a rate. eCPM is a result.<\/span>\r\n
Why eCPM Matters<\/b><\/h2>\r\neCPM is considered a very important metric because it shows the performance and effectiveness of how an ad inventory generates revenue.\u00a0<\/span>\r\n\r\nUnlike raw impression counts or click-through rates, eCPM reflects actual earnings per unit of inventory. It is the metric that tells you whether your ad monetization<\/a> strategy is working, which networks are delivering real value, and where optimization effort will have the most impact.<\/span>\r\n\r\nIt helps you:<\/span>\r\n