Ad viewability rate calculator
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Worked example
- Viewable impressions: 720
- Measurable impressions: 900
Viewability rate · 80%
See the formula
Viewable impressions ÷ Measurable impressions × 100.
How to interpret the result
The denominator is measurable impressions. Report measurability separately when comparing placements.
Publisher example
If 450 of 600 measurable ads were viewable, the rate is 75%. If 1,000 were served, measurability was 60%. Report both when deciding what to fix.
Related reading: How to reduce article text movement caused by late-loading ads
Measurement reference: Google Active View metrics