Cross-Platform Conversion Forecast
Estimate demand across channels, then measure which sources actually convert.
- Difficulty
- Easy
- Time to result
- ~weeks to results
- Steps
- 6
- Confidence
- 96%
Estimate launch potential by aggregating the audiences reachable through channels such as Instagram, Facebook, and email, then discounting the total to account for people who appear on more than one channel. Apply a baseline conversion assumption of roughly two to two-and-a-half percent to create a planning range, while recognizing that price and offer quality can produce outliers. During the promotion, assign a separate tracking link to every source so leads and sales can be attributed accurately. Afterward, compare actual conversions rather than raw follower totals. The model separates two questions: how many buyers might the current audience produce, and which channels produce them. That distinction helps a business forecast responsibly while directing future content and list-building toward proven sources.
Origin
Extracted from The Jasmine Star Show during Jasmine Star's coaching response to psychotherapist and membership creator Kathleen Veers.
Core principles
- 01A small audience does not prohibit selling, but audience size influences expected volume.
- 02Use a baseline conversion rate as a forecast, not a guarantee.
- 03Aggregate reach across owned and social channels.
- 04Discount overlap before estimating unique audience size.
- 05Attribute every promotional lead to its source.
- 06Invest according to conversion evidence rather than follower counts.
How to run it
- 1
Inventory Reach
Record the current audience size for every active social platform, newsletter, and other reachable channel. Use current figures from the same reporting period.
Pro tip Separate subscribers you can contact directly from followers controlled by a platform.
Watch out Do not assume every follower is active or reachable.
- 2
Estimate Unique Audience
Add the channel counts and subtract a reasonable overlap allowance for people who follow through multiple sources. Jasmine uses approximately 15 percent as a practical estimate rather than a researched universal constant.
Pro tip Replace the estimate with identity-level deduplication if your systems support it.
Watch out Presenting the raw sum as unique reach will inflate the forecast.
- 3
Apply a Baseline Rate
Multiply estimated unique reach by a two to two-and-a-half percent conversion range. Treat the result as a planning benchmark rather than a promised outcome.
Pro tip Model both ends of the range to create a conservative and an optimistic case.
Watch out Extremely high-priced or very low-priced offers can behave differently from the baseline.
- 4
Tag Every Source
Create separate promotional links for email, Instagram, Facebook, and any other source. Preserve those identifiers through registration and purchase wherever possible.
Pro tip Use consistent campaign and source names so reports remain readable.
Watch out A single shared link prevents reliable source comparison.
- 5
Compare Conversion Evidence
Measure leads and sales generated by each source after the campaign. Compare conversion quality, not just audience size.
Pro tip Calculate both lead conversion and paid conversion when the funnel includes a free event.
Watch out A large channel may contribute fewer buyers than a smaller but better-aligned audience.
- 6
Reallocate Growth Effort
Use the findings to decide where to publish, advertise, and build opt-ins next. Continue diversifying so the business does not depend entirely on one platform.
Pro tip Retain a presence on secondary channels while concentrating experiments on the strongest source.
Watch out Do not make allocation decisions from emotional attachment to a platform.
In the wild
A creator has 2,000 Instagram followers and 500 Facebook followers. Distinct campaign links reveal that the smaller Facebook audience generates more registrations and paid conversions than Instagram. The creator responds by developing more Facebook-native content rather than assuming Instagram deserves the larger investment because its follower count is higher.
→ Marketing effort moves toward demonstrated buyer concentration instead of visible audience size.
A membership owner combines her email and social audiences, discounts estimated overlap, and applies a two-to-two-and-a-half percent range before opening enrollment. She then uses channel-specific links to compare the forecast with actual registrations and purchases.
→ The owner sets realistic enrollment expectations and gains evidence for the next campaign.
Common mistakes
Treating the Baseline as a Guarantee
The two percent rule is a statistical planning reference, not a promise that every offer will convert at the same rate.
Double-Counting Followers
Adding every channel without accounting for overlap exaggerates the number of distinct people available to buy.
Following Vanity Metrics
Choosing a platform because it has more followers ignores whether those followers become leads or customers.
Is it for you?
Best for
It is best for creators and small businesses planning a product, service, course, or membership promotion across several channels.
Not ideal for
It is not ideal for businesses without reliable audience counts, trackable links, or a sufficiently defined offer.
From the transcript
“statistically they call it the 2% rule.”
“I take an aggregate and then I take out around 15%”
“not to be emotional about the source, but to actually start measuring it if you have the capabilities.”
From the episode
Avoiding Sales Burnout, Getting Real Engagement + Marketing Made Easy