Intro
Video length is one of the most important—yet often overlooked—factors influencing how much Facebook pays you per 1,000 views (CPM, or cost per mille). In 2025, understanding the link between content length and CPM is crucial for any creator looking to maximize earnings on the platform.
How Content Length Affects Facebook CPM
1. Eligibility for More Ad Breaks
- Videos over 3 minutes:
Qualify for mid-roll ad breaks in addition to pre-roll and post-roll ads. More ad slots mean more opportunities to earn revenue per view.
- Short videos (under 1 minute):
Usually only eligible for pre-roll ads (if any), limiting CPM and total earnings.
2. Higher CPM Rates for Long-Form Content
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Longer videos attract higher CPM rates because advertisers get more time to deliver their message and reach a more engaged audience.
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Short videos generally result in lower CPMs due to fewer ad opportunities and less audience retention.
3. Audience Engagement
Longer, well-produced videos tend to drive higher watch times and more interaction (comments, likes, shares). Facebook’s algorithm rewards this by boosting your content and attracting premium advertisers—raising your CPM.
Example CPM Ranges by Video Length
| Video Length | Typical CPM (USD) | Ad Breaks Eligible |
| Under 1 minute | $1–$2 | Pre-roll only (rarely used) |
| 1–3 minutes | $2–$4 | Pre-roll, limited mid-roll |
| 3+ minutes | $3–$8 (sometimes higher in top markets) | Pre-roll, mid-roll, post-roll |
Why Advertisers Prefer Longer Videos
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Better Ad Placement: More opportunities for natural ad insertion points.
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Higher Viewer Retention: Longer content often indicates higher-quality, more valuable material, attracting better ad spend.
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Improved Brand Messaging: Advertisers can communicate more effectively in content that holds attention.
Tips to Maximize CPM with Video Length
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Create videos that are at least 3 minutes long to unlock mid-roll ads.
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Plan your content to include natural breaks where ads can be inserted without disrupting the viewer experience.
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Focus on retaining viewers past the first minute—longer average watch times boost CPM.
Conclusion
In 2025, content length directly impacts how much you can earn per 1,000 views on Facebook. The sweet spot for maximizing CPM is producing high-quality videos over 3 minutes, which enables multiple ad breaks and attracts premium advertisers. By understanding and optimizing for content length, you’ll significantly improve your Facebook video monetization results.
