Growth calculator

SEO ROI Calculator

Estimate SEO traffic, leads, customers, revenue, gross profit, investment, ROI, payback, and scenario ranges from explicit assumptions.

Inputs

Defaults are visible and can be changed before calculation.

Inline validation messages appear here when a value needs to be corrected.

Currency *Applies to costs, revenue, gross profit, and investment outputs.Monthly search volume *Estimated monthly searches in the keyword set or topic cluster.Expected ranking CTR *Expected click-through rate from the modeled rankings.Visitor-to-lead rate *Share of organic visitors expected to become leads.Lead-to-customer rate *Share of organic leads expected to become customers.Average customer value *Revenue from each new customer during the modeled period.Monthly SEO cost *Ongoing monthly investment for SEO strategy, production, tooling, or retainers.Projection months *Number of months to model.Gross margin rateGross margin used to estimate contribution from modeled revenue.Ramp monthsMonths required to reach the modeled maturity traffic level.Traffic retention rateShare of modeled traffic retained after rankings, SERP changes, and decay.Content production costOne-time content investment applied in month 1.Technical implementation costOne-time technical SEO implementation investment applied in month 1.Monthly search volume growth rateOptional growth rate applied to the search volume each modeled month.Existing organic trafficExisting monthly organic traffic shown alongside modeled new traffic.Repeat purchase valueAdditional attributed revenue per customer during the modeled period.

Results

Results are deterministic scenario outputs, not guarantees.

Enter values and calculate to see the summary, supporting metrics, warnings, and interpretation.

Interpretation

Deterministic interpretation rules will explain what the modeled result means once a calculation is available.

Detailed breakdown

Intermediate calculation rows will appear here after calculation.

Formula

Steady-state traffic

steadyStateMonthlyTraffic = monthlySearchVolume × expectedRankingCtr × trafficRetentionRate

Ramp factor

rampFactor(month) = min(1, month / rampMonths)

New organic traffic

newOrganicTraffic(month) = searchVolume(month) × expectedRankingCtr × rampFactor(month) × trafficRetentionRate

Leads

leads(month) = newOrganicTraffic(month) × visitorToLeadRate

Customers

customers(month) = leads(month) × leadToCustomerRate

Revenue

revenue(month) = customers(month) × (averageCustomerValue + repeatPurchaseValue)

ROI

roi = (totalGrossProfit - totalInvestment) / totalInvestment

Assumptions

This is an assumption-driven scenario model, not a ranking forecast.
One-time content and technical implementation costs are applied in month 1.
Existing organic traffic is shown in total traffic but not credited as new initiative traffic.
Conservative and optimistic scenarios use deterministic traffic multipliers around the base case.

Worked example

Example: modeling a 12-month SEO initiative

With 20,000 monthly searches, a 6% CTR, a 6-month ramp, and $6,000.00 in monthly SEO cost, the model estimates new organic traffic, leads, customers, gross profit, ROI, and payback under the entered conversion assumptions.

FAQ

Is this SEO ROI calculator a traffic forecast?

No. It calculates deterministic scenario math from entered assumptions and should not be treated as a ranking or traffic guarantee.

How are one-time SEO costs handled?

Content production and technical implementation costs are applied in the first modeled month, while monthly SEO cost repeats throughout the projection window.

Why include conservative and optimistic scenarios?

They show sensitivity to lower or higher traffic using fixed deterministic multipliers rather than predictive estimates.

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Want help interpreting the model?

Use this calculator as a deterministic planning tool, then talk with Propel Collective about which assumptions are worth validating first.

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