Lead Conversion Funnel Calculator

Step-by-Step Guide

1. 1Build Your Funnel Stages: Start from the default 5-stage funnel or click Load Sample Data, then rename each stage to match your actual process — anywhere from 2 to 10 stages are supported.
2. 2Enter Values for Each Stage: Type the number of visitors, leads, or customers at each stage. Every metric updates instantly with a short debounce as you type.
3. 3Reorder or Add/Remove Stages: Drag a stage by its handle to reorder it, use the up/down arrows as an alternative, and use Add Stage or the ✕ button to change how many stages you're tracking.
4. 4Review the Visual Funnel and Metrics: Check the interactive SVG funnel diagram, overall conversion rate, funnel efficiency score, and the automatically highlighted biggest drop-off stage.
5. 5Read the Insights and Fix Bottlenecks: Review the auto-generated insights identifying your best and worst-performing transitions, then adjust values to model potential improvements.
6. 6Save, Compare, or Export: Save the funnel to history, compare it against a previously saved funnel, or export as CSV, JSON, PNG, SVG, or a printed report.

Key Features

• ✓2 to 10 fully customizable, reorderable funnel stages
• ✓Real-time calculation with a 150ms debounced update
• ✓Interactive SVG funnel diagram, proportional to stage values
• ✓Automatic biggest-bottleneck detection and highlighting
• ✓Funnel efficiency score based on geometric mean conversion
• ✓Funnel health indicator (Healthy, Needs Attention, Critical)
• ✓Drag-and-drop and arrow-button stage reordering
• ✓Strict validation toggle with over-100% conversion warnings
• ✓3 one-click sample datasets covering different funnel types
• ✓Undo support for recent stage edits (Ctrl/Cmd+Z)
• ✓Auto-saves your last session and restores it on return
• ✓Funnel history — save and compare current vs. previous
• ✓Export as CSV, JSON, PNG, or SVG
• ✓Print-ready PDF report and full-text copy
• ✓Keyboard shortcuts — Ctrl/Cmd+Z to undo, Esc to reset
• ✓No signup required — 100% free to use
• ✓All processing runs locally — no data leaves your browser

Pro Tips

• 💡Name your stages precisely — "Leads" means something different at every company, and a vague stage name makes a saved funnel confusing to interpret weeks later.
• 💡Fix the biggest drop-off first, not the lowest absolute conversion rate. A 10% conversion rate might be completely normal for that stage type, while a 30% drop where 90% is expected is the real emergency.
• 💡Use the efficiency score, not just overall conversion, when comparing funnels with different numbers of stages — a 4-stage funnel and an 8-stage funnel with the same overall percentage don't perform equally well per stage.
• 💡Save a funnel before making any significant change to your marketing or sales process, so you always have a true baseline to compare against with the Compare feature.
• 💡Model hypothetical improvements by manually adjusting one stage's value and watching how the overall conversion and efficiency score respond — this quickly shows which stage improvement would have the biggest overall impact.
• 💡Turn off Strict Validation only when intentionally modeling a hypothetical scenario — leaving it on for real historical data catches typos and data entry mistakes immediately.

Common Mistakes to Avoid

• ✕Don't compare drop-off percentages across stages of very different types without context — a 60% drop-off from Visitors to Leads is often normal, while a 60% drop-off from Sales Call to Customer usually signals a real process problem.
• ✕Don't build a funnel with stages that aren't strictly sequential subsets of each other — each stage should represent people who passed through every prior stage, or the conversion math won't reflect reality.
• ✕Don't ignore a low efficiency score just because the overall conversion rate looks acceptable — a low efficiency score across many stages can still add up to a passable headline number while hiding real inefficiency.
• ✕Don't treat the funnel efficiency score as a universal benchmark across industries — a 15/100 efficiency score might be entirely normal for a long, high-value B2B enterprise sales funnel and alarming for a short-cycle ecommerce funnel.
• ✕Don't forget to re-save your funnel to history after making changes if you want to track progress over time — the Compare feature only works against previously saved snapshots.