Cost Per Thousand (CPM)
Cost Per Thousand (CPM) measures the cost of serving 1,000 ad impressions. Here’s everything you need to know: what it is, why it matters, how to calculate it, and how to optimize it!
What is Cost Per Thousand (CPM)?
What is Cost Per Thousand (CPM)?
Cost Per Thousand (CPM) is an advertising metric that represents the cost of delivering 1,000 impressions of your ad. It’s widely used in display, video, and programmatic advertising to assess cost-efficiency for visibility-driven campaigns.
Why Is CPM Important?
CPM helps advertisers understand how much they’re paying for brand exposure. It’s especially important for campaigns focused on reach, awareness, or viewability rather than direct response.
How to Calculate CPM
Divide your total campaign cost by the number of impressions (in thousands) to get your Cost Per Thousand.
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The CPM Formula:
CPM = (Total Cost ÷ Total Impressions) × 1,000
Example of CPM in Action
If you spend $500 on a campaign that gets 100,000 impressions, your CPM is ($500 ÷ 100,000) × 1,000 = $5. This means you paid $5 per 1,000 views.
Optimize Your CPM with OWOX Data Marts
Optimize Your CPM with OWOX Data Marts
OWOX Data Marts connects cost and impression data across platforms, helping you track CPM by audience, format, and device. Use these insights to improve efficiency and maximize exposure.
What Is a Good CPM?
A good CPM depends on your industry and platform, but generally ranges between $2–$10. Lower CPMs paired with high visibility mean strong efficiency.
What Is a Bad CPM?
A high CPM with low engagement may signal ineffective targeting or expensive placements that don’t deliver value.
Best Practices for CPM
Use these strategies to keep CPM low while maintaining ad quality.
Target Smartly
Avoid overly broad targeting—refined audience segments can lower CPM while increasing relevance.
Test Creative Formats
Compare static, carousel, and video formats to find which drives impressions at the best cost.
Monitor Placement Performance
Review platform and device-level CPM to remove underperforming placements.
Common Mistakes to Avoid with CPM
Common Mistakes to Avoid with CPM
Don’t optimize for low CPM alone—focus on both visibility and post-impression performance like clicks or conversions.
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