Subscriber Retention Calculator
Calculate subscriber retention, churn rate, unsubscribe pressure, net growth, and replacement subscribers needed.
Calculate subscriber retention, churn, unsubscribe pressure, and the new subscribers needed to replace list losses.
Advanced inputsinactive losses and time period
What this means
Retention is 98.00% and churn is 2.00%. Net subscriber change is 410.
Retention rate
Excellent98.00%
Subscribers kept from the starting list.
Churn rate
2.00%
Lost subscribers divided by starting subscribers.
Monthly churn rate
2.00%
Churn normalized by the number of months in the period.
Lost subscribers
240
Total unsubscribes and other subscriber losses.
Net growth
Growing410
New subscribers minus lost subscribers.
Ending subscribers
12,410
Subscribers at the end of the period.
Replacement needed
240
New subscribers needed just to offset churn.
Understand whether the list is healthy
This calculator helps newsletter and email operators separate acquisition from retention. Add starting subscribers, new subscribers, unsubscribes, and other losses to see churn, retention, and net growth.
Use it when monthly subscriber growth looks good but the list still feels harder to grow than expected.
Subscriber retention formulas
- Lost subscribers = unsubscribes + other losses
- Retention rate = retained subscribers / starting subscribers
- Churn rate = lost subscribers / starting subscribers
- Net growth = new subscribers - lost subscribers
- Ending subscribers = starting + new - lost subscribers
Related calculator tools
FAQ
Common questions about retention, churn, and unsubscribes.
Start publishing from
one calendar.
Schedule posts to X and LinkedIn, publish newsletter issues, and keep the subscribers your writing earns.