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Last updated: July 2026 See pricing Open dashboard

Free Newsletter Tools

Free calculators and tools for newsletter operators — model your ROI, project paid subscription revenue, optimise your send times. No signup required to use.

Newsletter ROI Calculator

See exactly how much your newsletter is worth

Calculate the real revenue potential of your email newsletter. Enter your list size, engagement, and offer economics — we'll show your monthly revenue, lifetime value per subscriber, and cost savings vs. other platforms.

Subscriber-to-Revenue Calculator

Model your paid newsletter revenue at any scale

Model the revenue potential of a paid newsletter. Enter free list size, paid conversion rate, monthly price, and churn — see monthly, annual, and 5-year revenue with realistic retention curves.

Newsletter Send Time Recommender

Find the best time to send your newsletter

Personalised send-time recommendations based on your audience type, geography, and industry. Built from aggregate engagement data across 12M+ newsletter sends.