Email list growth calculator
See where your list is heading. Enter your current subscribers, how many you add each month and your monthly churn rate — the calculator compounds them to project your list size.
7,882
+2,882
1,918
Projected over 12 months.
Why churn changes everything
List growth isn't just how many people you add — it's adds minus losses. Every month a slice of your list unsubscribes, hard-bounces or goes stale. This calculator compounds both forces month over month so you see the real trajectory, not a straight line.
Churn compounds: 2.5% a month is roughly a quarter of your list gone in a year if you add nothing. That's why acquisition alone rarely keeps a list healthy.
- Starting subscribers — your active, mailable list today
- New subscribers / month — your average net new sign-ups
- Monthly churn — unsubscribes, bounces and cleaned addresses as a percent
Growing a healthy list
- Lower churn is often cheaper than raising acquisition — fix relevance first
- Re-engagement campaigns recover some at-risk subscribers before they churn
- Prune chronically inactive addresses; they hurt deliverability more than they help reach
- Track net growth, not gross sign-ups — vanity numbers hide a leaky list
Frequently asked questions
What churn rate should I use?
Typical email lists lose 1–3% per month to unsubscribes and bounces alone. Use your own historical average if you have it; 2–2.5% is a reasonable default.
Does this account for compounding?
Yes. Churn is applied to the current list size each month before new subscribers are added, so losses compound realistically.
Why is my net growth lower than my sign-ups?
Because churn eats into it every month. That gap is exactly why the projection matters — gross sign-ups overstate real growth.
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