Free sales funnel conversion calculator
Every business has a funnel — visitors become leads, leads become opportunities, opportunities become customers — and value leaks at each step. This free tool — built by a Singapore marketing agency — lets you enter the count at each stage of your funnel and instantly see the step-by-step conversion rate, the overall conversion, your biggest drop-off, and (with a deal value) the revenue and the worth of each top-of-funnel visitor. Add or rename stages to match your funnel. It runs entirely in your browser.
Why stage-by-stage conversion beats a single number
A single “conversion rate” hides where you’re actually losing people. Breaking the funnel into steps shows you the weakest link — the transition where the biggest percentage of prospects fall away. That’s almost always where a fix pays off most. Doubling a 2% visitor-to-lead step is usually far cheaper and more impactful than buying twice the traffic to feed a leaky funnel. The tool highlights your biggest drop-off so you know exactly where to focus.
The maths of compounding conversion
Funnel rates multiply, which is why small improvements compound. If each of four stages converts at 20%, only 0.16% make it end to end. Lift each stage to 25% and the end-to-end rate nearly doubles. This is the core insight of conversion rate optimisation: you don’t need a breakthrough at one stage — modest gains across several stages multiply into a dramatically better result. Model it above by nudging each stage’s count and watching the overall rate move.
Turning conversion into revenue
Add your average deal value and the tool shows total revenue and — the number most businesses never calculate — the revenue per top-of-funnel visitor. That figure tells you the maximum you can profitably pay to acquire a visitor, and it’s the bridge between your funnel and your ad budgets. Pair it with our LTV:CAC calculator and ROAS calculator to build a complete picture of your marketing economics.
Frequently asked questions
What is a good funnel conversion rate?
It varies hugely by industry, channel and how you define each stage, so benchmarks are only rough guides. The more useful comparison is against your own past performance and, stage by stage, against where you’re losing the most people. Focus on improving your weakest step rather than chasing a generic number.
How do I calculate overall conversion rate?
Divide the count at the final stage by the count at the first stage. For example, 60 customers from 10,000 visitors is a 0.6% overall conversion rate. The tool calculates this automatically along with each intermediate step.
What’s the biggest drop-off and why does it matter?
It’s the stage-to-stage transition where you lose the largest percentage of prospects. It matters because it’s usually your highest-leverage fix — a small improvement there recovers more prospects than the same effort spent elsewhere.
Can I model more or fewer stages?
Yes — use “Add stage” and the remove buttons to match your exact funnel, from a simple two-step opt-in to a full multi-stage B2B pipeline. Rename each stage to your own terminology.
