Reverse-engineer your outbound activity targets from revenue goals. Find out how many prospects, senders, and domains you actually need before you burn your deliverability trying.
Most outbound teams set their daily send volume based on gut feel. This calculator flips it. Start with the revenue number your team needs to hit, and it works backwards through every conversion step to show you what your outbound operation actually requires:
- Prospects needed per quarter to hit your pipeline target
- Daily sends per sender and whether you're over the safe deliverability threshold
- Domain and sender infrastructure required to support your volume
- TAM burn rate so you know when you'll exhaust your addressable market
- Sales cycle reality check showing when revenue actually lands
It also flags problems. If your target needs 200 sends per day from a single inbox, or you'll burn through your entire TAM in one quarter, you'll know before you start, not three months in.
Standard Outbound uses industry benchmarks for cold email: 1-3% positive reply rates, 20-30% reply-to-meeting conversion. This is where most teams operate.
Signal-Driven Outbound models what happens when you layer intent data, job changes, technographic signals, and conversational intelligence into your targeting. Reply rates jump to 5-15%. Meeting conversion doubles. The gap between these two modes is the operational case for investing in signal infrastructure.
The calculator uses a reverse funnel model:
Revenue target
/ Deal size = Deals needed
/ Win rate = Opportunities needed
/ Meeting-to-opp rate = Meetings needed
/ Reply-to-meeting rate = Replies needed
/ Reply rate = Prospects needed
Daily send volume is then calculated from prospects needed, sequence steps, sending days per week, and sender count. The deliverability check flags when any sender would exceed 40 emails per day.
Single HTML file. No build step, no dependencies, no framework. Vanilla JS, CSS custom properties, responsive layout. Works in any modern browser.
- Fonts: Inter Tight, JetBrains Mono (loaded from Google Fonts + Bunny CDN)
- Analytics: Optional Supabase integration for anonymous usage tracking
- Hosting: Designed to be embedded via iframe or served standalone
Open index.html in a browser. That's it.
Drop it in an iframe:
<iframe
src="https://yourdomain.com/outbound-sequence-calculator/index.html"
width="100%"
height="900"
frameborder="0"
style="border: none; border-radius: 8px;">
</iframe>MIT. Use it, fork it, embed it. Attribution appreciated but not required.
GTM Layer builds revenue signal systems for B2B teams. We combine intent data, conversational intelligence, and CRM automation into outbound operations that actually convert.
This calculator is part of our public tools series, giving away the thinking behind how we scope and build outbound programmes for clients.