Growth calculator

Landing Page Conversion Lift Calculator

Estimate leads, customers, revenue, gross profit, ROI, and payback from improving a landing page conversion rate.

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 customer value, implementation cost, and projected revenue.Monthly visitors *Current monthly traffic to the landing page.Current conversion rate *Current visitor-to-lead conversion rate for the page.Target conversion rate *Modeled visitor-to-lead conversion rate after the improvement.Lead-to-customer rate *Share of landing page leads that become customers.Average customer value *Average revenue or contract value from each acquired customer.Gross margin rateGross margin applied to projected incremental revenue.Implementation costOne-time cost to design, build, test, or launch the landing page improvement.Monthly traffic growth rateOptional month-over-month traffic growth applied during the projection.Projection monthsNumber of months to model.Repeat purchase valueOptional additional value expected from each acquired customer in the period.Refund rateShare of customer value expected to be refunded or reversed.

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

Monthly traffic

traffic(month) = monthlyVisitors × (1 + monthlyTrafficGrowthRate)^(month - 1)

Incremental leads

incrementalLeads(month) = traffic(month) × (targetConversionRate - currentConversionRate)

Incremental customers

incrementalCustomers(month) = incrementalLeads(month) × leadToCustomerRate

Net value per customer

netValuePerCustomer = (averageCustomerValue + repeatPurchaseValue) × (1 - refundRate)

Implementation ROI

roi = (totalIncrementalGrossProfit - implementationCost) / implementationCost

Assumptions

The model estimates value only if the target conversion rate is achieved.
Traffic growth compounds monthly through the projection window when entered.
Implementation cost is treated as a one-time cost.
The calculator is deterministic scenario math, not a forecast or guarantee.

Worked example

Example: lift from 3% to 4.5%

With 10,000 monthly visitors, a lift from 3% to 4.5% and a $1,000.00 customer value, the model estimates incremental leads, customers, and payback over 12 months.

FAQ

Is this a conversion-rate forecast?

No. It models the financial impact if the target conversion rate is achieved under the entered assumptions.

What is maximum economically rational implementation cost?

It is the total modeled incremental gross profit over the projection period before subtracting implementation cost.

How is payback calculated?

Payback is the first month when cumulative incremental gross profit equals or exceeds the implementation cost.

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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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