Email List Growth Rate Calculator
Why growth decelerates on its own.
Net growth rate
3%
1,260 net a month
Additions are a fixed number; losses are a percentage of a growing base. That is why growth decelerates on its own — at this churn rate the list converges toward 124,688 contacts and stops, no matter how long you keep acquiring.
How the Email List Growth Rate Calculator works
Additions are a fixed number; losses are a percentage of a growing base. That asymmetry means growth decelerates on its own, and every list converges toward an equilibrium size set by acquisition divided by churn — no matter how long you keep acquiring.
Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price — check the platform's current fee schedule before you price a product against it. This is not tax or business advice.
Frequently asked questions
How do I calculate list growth rate?
New subscribers less unsubscribes and bounces, divided by list size. Projecting forward requires iterating, because the losses apply to a base that keeps changing.
Why does my list stop growing?
Because churn scales with size and acquisition does not. At 1.5% monthly churn and 1,900 new subscribers, the list stabilises around 127,000 and stops regardless of effort.
How do I raise the ceiling?
Reduce churn or increase acquisition — but reducing churn is usually cheaper, and it raises the ceiling proportionally rather than linearly.
Is a bigger list always better?
No. A smaller engaged list delivers better inbox placement, costs less on per-contact pricing, and generates more revenue per email. List size is a vanity metric; revenue per subscriber is not.