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SEO Funnel Calculator

The SEO Funnel Calculator models how an audience moves from search impressions to clicks, website visits, leads, and customers. It is useful when a single conversion rate hides where volume is being lost across the acquisition path.

Start with organic impressions, then enter a click-through rate, landing retention rate, lead conversion rate, and lead-to-customer close rate. The calculator estimates each stage and the overall customer yield from impressions. Use it to compare bottlenecks, set stage-specific targets, and test how small rate changes compound through the funnel.

Inputs

views
%
%
%
%
Result
—
Estimated customers
Estimated organic clicks—
Retained landing visits—
Estimated leads—
Impression-to-customer rate—

1. Enter top-of-funnel volume
Add organic impressions for the period being modeled.

2. Set the search CTR
Enter the percentage of impressions expected to become clicks.

3. Account for retained visits
Use the share of clicks that become usable landing visits after redirects, consent, or tracking loss.

4. Enter lead and close rates
Apply the visit-to-lead rate and the share of leads expected to become customers.

5. Inspect each stage
Use the breakdown to locate the stage with the greatest volume loss or leverage.

Clicks = Impressions × CTR Visits = Clicks × Landing Retention Rate Leads = Visits × Lead Conversion Rate Customers = Leads × Close Rate

Each percentage is divided by 100 before multiplication. The model is sequential, so every stage uses the output of the previous stage. It assumes rates are stable across the modeled volume and that each customer follows the represented path.

What the result means

The result is the expected number of customers after all four funnel rates are applied. The overall rate shows the compounded customer yield from one impression.

Round stage outputs only for display; the calculator carries full precision through the calculation to avoid compounding rounding errors.

Given: 300,000 impressions, 4.2% CTR, 92% landing retention, 3.5% visit-to-lead rate, and 18% close rate.

Calculation:
Clicks = 300,000 × 0.042 = 12,600
Visits = 12,600 × 0.92 = 11,592
Leads = 11,592 × 0.035 = 405.72
Customers = 405.72 × 0.18 = 73.03

Result: The funnel estimates about 73 customers. The compounded impression-to-customer rate is approximately 0.0243%.

Why include a landing retention rate?

Not every recorded search click becomes a usable site visit. Redirects, tracking loss, page failures, or immediate exits can create a gap.

Can I skip the lead stage for ecommerce?

This version models a lead-based funnel. For direct purchases, use the visit-to-conversion rate and treat the close rate as 100%.

Which stage should I improve first?

Compare the size of the loss, the feasibility of improvement, and the economic value of the downstream gain. The weakest percentage is not automatically the best opportunity.

Can the rates come from different periods?

They can, but the forecast is more coherent when rates represent similar markets, traffic sources, and time periods.

Why are customer results shown with decimals?

Forecasts can produce fractional expected values. Interpret them as an average expectation and round for operational planning when appropriate.