A prospecting funnel calculator turns four counts (sourced, worked, advanced, closed-won) and one cost per verified contact into the two numbers a vendor invoice never shows: what a closed-won sourced deal costs, and which step loses the most contacts you already paid for.
No signup. Your numbers stay in your browser. Defaults are cited under the tool.
Sourced to worked: 1,200 contacts fall out here, 60% of what you sourced. That is $360 of the month's data spend on contacts nobody touched.
Sourced is not pipeline; the leak is the step nobody inspects.
Supered (2026). Prospecting Funnel Calculator. At 2,000 sourced contacts a month and $0.30 per verified contact, a closed-won sourced deal costs $75 and the biggest leak is sourced to worked. https://www.supered.io/tools/prospecting-funnel-calculator/
<iframe src="https://www.supered.io/tools/prospecting-funnel-calculator/?embed=1" title="Prospecting Funnel Calculator by Supered" width="100%" height="1100" style="border:1px solid #252A4A22;border-radius:12px" loading="lazy"></iframe> <p>Source: <a href="https://www.supered.io/tools/prospecting-funnel-calculator/">Prospecting Funnel Calculator, Supered</a></p>
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Sources: Bridge Group, 2025 SDR Metrics and Compensation report (351 companies): 10 held meetings per SDR per month, $50K median ASP, 40% attrition, 3.0-month ramp. Clay, clay.com/pricing (opened 2026-09-25): Data Credits start at $0.05 each; Growth plan $495 a month with 6,000 Data Credits. "Roughly six credits per contact" and "$0.30 per verified contact" are Supered's arithmetic on Clay's pricing calculator, not a Clay figure. "10 SDRs x 200 contacts a month" is a supposition. Supered's own pricing is not shown on this page.
Every data vendor prices a contact. Apollo prices a credit, ZoomInfo prices an export, Clay prices a Data Credit that is only spent when a result comes back. All of those are the cost of the first step. None of them says what the step was for. Divide the month's data spend by the deals that month's contacts produced and you get a number the invoice cannot show you: what it costs to buy a closed-won deal through prospecting. Two teams with the same cost per contact can differ by ten times on that number, and the difference is never the vendor. It is what happened between sourced and closed.
The second row is the one the calculator makes you fill in yourself, on purpose. "Worked" has no vendor definition because vendors do not see it. Pick one: a first touch, a completed sequence, a live conversation. Then count contacts against it every month. The gap between sourced and worked is usually the biggest drop in the funnel, and it is usually invisible, because RevOps sees credits consumed and the sales manager sees meetings held. Neither of them sees the 1,200 contacts in between. You can only expect what you inspect, and until worked is counted, sourcing is not inspectable.
The tool names the step where the most contacts fall out, in contacts and in dollars. It is dollars because those contacts were paid for. A leak at sourced-to-worked is a rep-behavior problem: the list was built and never run. A leak at worked-to-advanced is a targeting or messaging problem: the right motion on the wrong people, or the wrong motion on the right ones. A leak at advanced-to-closed is a sales-process problem, and it belongs to the sales process rather than to prospecting. The fix is different at each step, which is why naming the step matters more than the overall conversion rate.
This calculator is the manual version of the fifth move in the rep loop described in the sales prospecting guide: the manager sees sourced, worked, closed, and sets the standard. If your team is paying for more than one data contract, run the data-vendor cost calculator next, and read the B2B data providers hub for what each vendor actually meters. For the wider evidence that a defined process only produces results to the degree it is inspected, The State of Sales Enablement has the survey data: 89% of teams have a defined process and 36% see reps run it.
Whatever your team says it is, written down. Some teams call a contact worked after one touch, some after a full sequence, some only after a live conversation. The calculator does not care which definition you pick. It cares that you pick one and count against it, because the sourced-to-worked step is the one that never shows up in a vendor report and the one where the most paid-for contacts usually disappear.
Because a contact is a cost and a closed-won deal is the thing you bought it for. Cost per verified contact is what the vendor invoices. Cost per closed-won sourced deal divides the whole month of data spend by the deals it produced, so a cheap contact that nobody works costs more per deal than an expensive one that gets closed. It is the number that tells you whether the data budget is working.
The team-size defaults are a supposition used across our prospecting pages: ten SDRs sourcing 200 contacts a month each. Held meetings use the Bridge Group 2025 SDR report median of 10 held meetings per SDR per month, and average deal value uses that report's $50K median ASP. Cost per verified contact uses our arithmetic on Clay's published pricing: roughly six Data Credits per contact at $0.05 each, about $0.30. Every default is editable, and the sources are listed under the tool.
Supered runs on the customer's own Clay account and puts Clay's waterfall in the rep's hands on the LinkedIn profile, the company site, or the CRM record they are already looking at. Then the sourced contact enters a process Supered guides and inspects: sourced, worked, advanced, closed, with your definition of worked and closed. This calculator is the manual version of the view a manager gets inside Supered.
Supered puts Clay's waterfall in every rep's hands where they already work, then guides and inspects what happens to the contact after. Thirty minutes to see the funnel you just calculated, live on your team's deals.