Free Tools
Newsletter advertising calculators
Interactive tools for publishers and advertisers to model newsletter ad economics — revenue, CPM, sponsorship pricing, and fill rate.
Newsletter Ad Revenue Calculator
Estimate monthly ad revenue from subscribers, open rate, sends, and ad slots.
Newsletter CPM Calculator
Calculate CPM from total spend and impressions, or reverse-engineer spend from a target CPM.
Sponsorship Rate Calculator
Price a direct newsletter sponsorship based on list size, open rate, and niche CPM benchmarks.
eCPM & Fill Rate Calculator
Compute effective CPM from revenue and impressions, and fill rate from requests vs. delivered ads.
Ready to monetize your newsletter?
MailAdx turns these estimates into real revenue with open-time ad serving and programmatic fill.
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Setup in 30 minutes
Dedicated onboarding