Email List Growth Forecaster
Forecast your email list size over the next 12 months from site traffic, signup rate and monthly unsubscribe rate.
Your list
Forecast
List size in 12 months
List growth compounds month after month
A 1.5% visitor-to-signup rate looks small until you add it up over a year. This forecaster takes your current list, adds the signups your traffic brings in each month, and removes the share of the list that unsubscribes. The month-by-month table shows which lever matters most: more traffic, a higher signup rate, or a lower unsubscribe rate. The unsubscribe rate is often the cheapest to fix and the most overlooked.
How the forecast works
New signups per month are your monthly visitors times your signup rate. Each month, the tool subtracts your unsubscribe rate from the current list size, then adds the new signups. Because unsubscribes are a percentage of a growing list, losses rise as the list grows, so growth slows over time unless traffic or signups grow too.
Ways to grow faster
- Offer a useful lead magnet instead of a generic "join our newsletter" box
- Place signup forms where readers finish an article, not only in the footer
- Send fewer, better emails to keep unsubscribes down
- Clean out inactive contacts so your rates reflect real readers
Frequently asked questions
What signup rate is healthy?
Around 1 to 2% of visitors is normal, and 2 to 4% is excellent. Going above 4% usually takes a high-value lead magnet or a well-tuned popup.
Does the forecast include bounces and spam complaints?
Not separately. If you want to account for them, add them to your monthly unsubscribe rate.
Why does growth slow down over the year?
Unsubscribes are a percentage of the whole list, so you lose more people each month as the list gets bigger while new signups stay flat.