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Marketing Academy · Field Work●Conversion Rate Optimization
MiniForecast· 25 minutes

Build the Business Case: Forecasting a CRO Revenue Lift

Warby Parker

Objective: Given real traffic, conversion, and AOV numbers, calculate baseline revenue, Revenue per Visitor, and the annual dollar lift from a targeted conversion rate improvement, using the lesson's exact formulas.

You're building a Q4 budget case for a CRO hire at Warby Parker's online store. Finance wants a dollar figure, not a percentage.

Show your work with the exact formulas from the lesson; round to the nearest dollar.

Before you start

What you'll need

Free path (everything below is enough to finish)

FreeRun the CR, RPV, and annual lift calculations

Free, formula-driven, easy to hand to a finance stakeholder

The process

2 steps

Step 01 of 02

Revenue per Visitor (RPV)

RPV = AOV x Conversion Rate. It collapses conversion rate and order value into a single dollar-per-visitor figure.

The product page gets 80,000 monthly visitors and 1,760 monthly conversions, with a $150 average order value. What is the current conversion rate and RPV?

Google Sheets— New sheet, 2 formula cells: CR and RPV.

Procedure

  1. CR = (1,760 / 80,000) x 100
  2. RPV = $150 x CR (as a decimal)
  3. Record both figures to 2 decimal places
Sample output
CR = (1,760 / 80,000) x 100 = 2.2%
RPV = $150 x 0.022 = $3.30 per visitor

Healthy

CR and RPV are both computed from the same underlying numbers, with no rounding before the final step.

Unhealthy

Rounding CR to '2%' before computing RPV, which understates RPV by a meaningful margin at scale.

What this means

RPV of $3.30 means every 1,000 visitors sent to this page is worth $3,300, regardless of channel. That is the number a budget case should lead with.

So what do I do about it?

SymptomActionEffort
The budget case cites conversion rate percentage onlyConvert CR to RPV before presenting to a non-marketing audience5 min
YouYou can do this yourself, no engineering access required.

Step 02 of 02

Annual lift calculation model

Baseline: Visitors x Current CR x AOV. Target: Visitors x Target CR x AOV. Annual lift: (Target - Baseline) x 12.

If a CRO program lifts CR from 2.2% to 2.9% with traffic and AOV held constant, what is the annual revenue lift?

Google Sheets— Add Baseline, Target, and Annual Lift rows below the CR/RPV cells.

Procedure

  1. Baseline monthly revenue = 80,000 x 0.022 x $150
  2. Target monthly revenue = 80,000 x 0.029 x $150
  3. Annual lift = (Target - Baseline) x 12
Sample output
Baseline: 80,000 x 0.022 x $150 = $264,000/mo
Target: 80,000 x 0.029 x $150 = $348,000/mo
Annual lift: ($348,000 - $264,000) x 12 = $1,008,000/year

Healthy

The forecast states a single dollar figure with the underlying assumption (+0.7pp CR) named explicitly.

Unhealthy

Presenting '32% more revenue' with no visitor count or AOV shown, so the claim can't be checked.

What this means

A 0.7-percentage-point CR lift, holding traffic and AOV flat, is worth just over $1M a year here. That is the number that gets a budget approved.

So what do I do about it?

SymptomActionEffort
Leadership asks 'so what does this actually mean in dollars'Always attach the 3-line baseline/target/annual-lift table to any CR pitch5 min
YouYou can do this yourself, no engineering access required.

Final deliverable

A one-page CRO business case showing current CR, RPV, baseline monthly revenue, target revenue at +0.7pp CR, and the resulting annual dollar lift.

See a reference example
Sample output
Casper Sleep CRO business case (excerpt)

Current: 45,000 visitors/mo x 1.9% CR x $900 AOV = $769,500/mo
Target: 45,000 visitors/mo x 2.6% CR x $900 AOV = $1,053,000/mo
Annual lift: ($1,053,000 - $769,500) x 12 = $3,402,000/year
RPV moves from $17.10 to $23.40 per visitor.

Success criteria

You're done when you can:

  • CR and RPV are both computed correctly from the raw inputs
  • Baseline and target revenue use the exact 3-step model, not a shortcut percentage
  • The final annual lift is a single, defensible dollar figure