Email Churn Rate Calculator

Email Churn Rate Calculator shows you how fast your subscriber list is shrinking and what that decay is costing you. Enter your list size, subscribers lost, and new subscribers gained over a period, and get your churn rate, retention rate, annualized churn, average subscriber lifetime, and revenue at risk, plus a forward projection of your list size.

Churn is easy to ignore because it happens gradually, but a list losing 5% of subscribers every month has effectively turned over in less than two years. This tool makes that decay visible so you can act on it before it erodes your reach and revenue.

• Churn and retention rate: Instantly see the percentage of subscribers lost and retained over your chosen period.
• List health gauge: Visual risk meter comparing your churn rate to healthy benchmarks.
• Annualized churn and subscriber lifetime: Understand long-run list decay and how long the average subscriber stays.
• Revenue at risk: Estimated recurring revenue lost to churn, this period and annualized.
• Scenario comparison: Compare two churn rates side by side to see the difference in list size, revenue, and subscriber lifetime.
• Growth projection: Model your list size forward given your churn and growth rates.

1. Enter your starting list size and choose the time period you are measuring (month, quarter, or year).
2. Enter subscribers lost and gained during that period.
3. Add average revenue per subscriber to see revenue at risk.
4. Review your churn rate, retention rate, and risk gauge.
5. Use the Compare tab to weigh two different churn scenarios.
6. Use the Growth Projection tab to see where your list is headed over the next months and years.

Example 1: Newsletter with 12,000 subscribers loses 240 and gains 300 in a month. Monthly churn is 2.0%, net growth is positive, and annualized churn works out to about 21.5%.

Example 2: E-commerce list of 50,000 loses 3,500 in a quarter with no meaningful gains. Quarterly churn of 7% annualizes to roughly 24%, and at $0.40 average monthly revenue per subscriber that represents real recurring revenue at risk.

• Spot list decay early: See churn trends before they become a crisis.
• Quantify the cost: Translate subscriber loss into estimated revenue impact.
• Benchmark against healthy ranges: Know whether your churn is normal or a warning sign.
• Plan for growth: Model how much new-subscriber growth you need to offset churn.
• Compare strategies: Test how reducing churn changes your outlook.
• 100% free and private: No sign-up, no data stored, runs in your browser.