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Newsletter Sponsorship Calculator

Free Productivity Unit • Professional Creator Audit • Updated 2026

Fine-tune your estimates manually.

Total Subscribers

Average Open Rate (%)

Cost Per Thousand Opens (CPO)

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Configure parameters or paste a link above to generate your premium performance audit.

How This Tool Works

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Built using linear regression models against market bid data.

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Calculated results are reviewed for current quarterly accuracy.

Calculate ad slot pricing for your newsletter based on your actual engagement (opens) rather than vanity sub counts.

Newsletter operators on Substack, Beehiiv, or ConvertKit.

Price = ((Subs \times Open%) \div 1000) \times CPO

Revenue analysts specializing in creator economy metrics.