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Marketing Funnel Calculator - Conversion Rates by Stage

Calculate stage-by-stage funnel conversion rates from visitors to leads, qualified leads, opportunities and customers, then flag the lowest-converting measured stage.

Enter Your Funnel Stage Counts

Use counts from the same reporting period and one consistent funnel definition. Each downstream stage should be a subset of the stage before it.

Top-of-funnel visits or sessions in the measured period.
People who became leads from that traffic.
Leads that met your qualification rule.
Qualified leads that became active sales opportunities.
Opportunities that became new customers.
Visitor-to-Lead Conversion Rate-
Lead-to-Qualified Lead Rate-
Qualified Lead-to-Opportunity Rate-
Opportunity-to-Customer Rate-
Overall Visitor-to-Customer Rate-
Lowest-Converting Stage-
Funnel Signal-

Example: 10,000 Visitors to 45 Customers

Visitors: 10,000

Leads: 1,200

Qualified leads: 600

Opportunities: 180

Customers: 45

Visitor-to-lead rate: 12.00%

Overall visitor-to-customer rate: 0.45%

The sample inputs shown here match the default calculator values so the example can be reproduced directly.

Formula

Stage Conversion Rate = Next Stage / Previous Stage x 100Overall Funnel Conversion = Customers / Visitors x 100Stage Drop-off = Previous Stage - Next Stage

Input Checklist

Same scope: Keep funnel stage counts from one comparable reporting period.Stable definitions: Use the same stage, cost or conversion definitions when comparing results over time.Decision context: Read the result with downstream quality, value and business economics rather than as an isolated benchmark.

Add This Marketing Funnel Calculator to Your Website

Embed this free calculator on a marketing, analytics or planning resource page. The ?embed=1 view keeps the calculator focused and supports responsive iframe resizing.

Embedding requirement: Keep the SolveIndex attribution and source link visible and unchanged.
How to Interpret the Result
Use the lowest stage rate as a diagnostic starting point, then compare that stage with its own historical performance and segment mix. A mathematically low rate is not automatically unhealthy because qualification stages are intentionally selective. Review absolute customer volume as well as percentages, and keep stage definitions stable before comparing periods.
Marketing - Performance & Planning
Use the metric in context
Understand funnel stages, stage conversion rates, bottlenecks and how to diagnose where qualified demand is being lost.
Read the Marketing Funnel Conversion GuideBrowse all guides
Marketing Funnel Calculator Frequently Asked Questions
It calculates the conversion percentage between each sequential funnel stage plus the overall visitor-to-customer rate.
Yes. The same sequential math works for a sales funnel when visitors, leads, qualified leads, opportunities and customers map to your own documented stages.
This tool models a nested sequential funnel. Each downstream count should be a subset of the previous stage for the same cohort and reporting period.
No. It is a diagnostic signal. A qualification stage can be intentionally selective, so compare each stage with its historical baseline, segment mix and downstream quality.
Yes. Rename the stages conceptually to match your process, but keep definitions stable and make sure each stage belongs to the same sequential cohort.
Use the calculator that matches the funnel stage or planning decision you are evaluating.
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Marketing Funnel Calculator Disclaimer: Results are planning and diagnostic estimates based on the funnel definitions and counts you enter. Attribution, cohort timing and stage definitions can change reported conversion rates.