Email List Growth Calculator
Project list size with sign-ups and list decay.
Growth marketers and content teams rely on the free Email List Growth Calculator to nail Email List Growth in seconds — no spreadsheets, no sign-up. Enter your numbers, get an accurate result instantly, and compare scenarios to make smarter pricing, budgeting and growth calls.
About Email List Growth Calculator
This projects how big your email list will be over time, factoring in new sign-ups and natural list decay (unsubscribes and bounces). The formula is simple: Future Size ≈ Current × (1 − decay)^months + accumulated sign-ups. For example, a 10,000 list at 500 new/mo and 0.5% monthly decay grows steadily. The free Email List Growth Calculator does the math for you — just enter your current list size, monthly sign-ups and monthly decay rate and read the result instantly. It runs entirely in your browser with no sign-up, no limits and nothing to install.
How to use Email List Growth Calculator
- 1Enter your current list size, monthly sign-ups and monthly decay rate into the calculator.
- 2The Email List Growth is computed automatically using the formula Future Size ≈ Current × (1 − decay)^months + accumulated sign-ups — there's no button to press.
- 3Change any input to model a different scenario, then note or copy the result.
Why use Email List Growth Calculator?
- ✓Calculates Email List Growth instantly with the correct formula — no spreadsheet needed
- ✓100% free and unlimited, with no sign-up, login or paywall
- ✓Runs entirely in your browser, so the numbers you enter stay private
- ✓Updates live as you type — perfect for comparing scenarios
Frequently asked questions
How do you calculate Email List Growth?+
This projects how big your email list will be over time, factoring in new sign-ups and natural list decay (unsubscribes and bounces). The formula is: Future Size ≈ Current × (1 − decay)^months + accumulated sign-ups. For example, a 10,000 list at 500 new/mo and 0.5% monthly decay grows steadily.
What is email list decay?+
Lists naturally shrink about 20–30% a year as people change jobs, unsubscribe or stop engaging — so steady acquisition just maintains size.
Is the Email List Growth Calculator free to use?+
Yes — it's completely free, with no sign-up, no login and no usage limits. You can run it as many times as you like.
Is my data private?+
Yes. The Email List Growth Calculator runs entirely in your browser, so the figures you enter are never uploaded or stored on any server.
Embed Email List Growth Calculator on your website
Want Email List Growth Calculatoron your own site? Paste this snippet into any HTML page — it's free, with no API key or sign-up. The tool loads in an iframe and keeps working exactly as it does here.
<iframe src="https://tooljolt.com/tools/email-list-growth-calculator" width="100%" height="640" style="border:1px solid #e5e7eb;border-radius:12px;max-width:680px" title="Email List Growth Calculator — ToolJolt" loading="lazy"></iframe>