Landing Page Conversion Calculator
With a significance check, so you stop peeking.
With a significance check, so you stop peeking.
Lift from B
17.39%
significant at 95%
A z score of 1.98 clears the 95% threshold, so the difference is unlikely to be chance. Run the test to a planned end rather than stopping here: peeking at significance repeatedly is how false positives get shipped.
How the Landing Page Conversion Calculator works
Stopping a test the moment it looks like a winner is the single most common way A/B testing produces changes that do not replicate. A significance check tells you whether the difference could easily be noise, and at typical ecommerce volumes, it usually could.
Also known as: landing page conversion rate · PPC landing page performance · campaign page conversion
Behind the number
Landing page conversion is conversions divided by sessions landing on that page: conversions ÷ landing sessions × 100.
For paid traffic the relevant version measures against the campaign's objective: a purchase, a lead, a signup, rather than any downstream action.
Revenue per landing session is the better comparative figure where pages drive different order values.
The same thing with real figures
A landing page receiving 8,000 sessions and producing 240 orders converts at 3.0%, above the 2.5% site average because the traffic arrives with specific intent.
At $58 that is $13,920 of revenue and $7,656 of contribution. If the traffic cost $0.95 a click, the page cost $7,600, barely break-even.
Raising conversion to 3.6% produces 288 orders and $9,187 of contribution against the same $7,600, a viable campaign rather than a marginal one.
A 0.6 percentage point improvement was the difference, which is why landing page work is usually the cheapest way to make a marginal campaign profitable.
The catch
Comparing landing pages against each other is only valid when the traffic is comparable. A page fed by branded search will outperform one fed by cold prospecting regardless of the page.
Conversion measured on the landing page also misses visitors who navigate elsewhere and convert later, which understates content-led pages substantially.
Applying it
Compare pages within the same traffic source rather than across sources, and use revenue per session so pages driving different products are comparable.
Then test the headline and the primary call to action before anything else, since those two elements account for a disproportionate share of the variance between pages.
Message match and the cost of a generic destination
The single largest determinant of landing page performance is whether it continues the conversation the advertisement started. A specific ad linking to a general category page loses much of the intent it paid for.
Building a page per campaign theme is more work than sending everything to one page, and the conversion difference routinely exceeds anything achievable through design.
For a business running several campaigns to a single destination, splitting them into matched pages is usually the highest-return CRO project available, and it is measurable within a fortnight because the traffic is already there.
Load speed matters disproportionately on paid landing pages, since visitors arriving from an advertisement have less commitment than those who navigated deliberately and abandon a slow page sooner.
That makes speed work on landing pages a media efficiency measure rather than a technical nicety, because it directly lowers the cost per acquisition on the traffic being bought.
Removing site navigation from a dedicated campaign landing page frequently improves conversion, since every alternative path is an opportunity to leave the flow the advertisement paid for.
Testing the offer rather than the page layout usually produces larger movements, since what is being promised matters more to a visitor than how it is arranged.
Matching the page's language to the search term that brought the visitor, rather than to internal product naming, removes a small mismatch that costs conversions at scale.
Where to go next
The Landing Page Conversion question rarely arrives on its own. These are the ones that usually come with it:
- Conversion Rate Calculator — Points look small; the revenue effect is not.
- Sessions to Conversions Calculator — How much traffic a test actually needs.
- Revenue per Visitor Calculator — The right metric for an A/B test.
- Etsy Fee Calculator — Every Etsy fee on one sale, itemised.
Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price, check the platform's current fee schedule before you price a product against it. This is not tax or business advice.
Frequently asked questions
How do I know if a test result is real?
Compare the difference against its standard error. A z score above 1.96 corresponds to 95% confidence, which is the conventional threshold, not a guarantee.
Why is peeking a problem?
Because random fluctuation crosses the threshold temporarily. Checking repeatedly and stopping when it does turns a 5% false positive rate into something far higher.
How long should a test run?
To a sample size decided before it starts, and always in whole weeks to cover the weekly cycle. Stopping early on a good result is the most expensive habit in testing.
What if my traffic is too low to test?
Then test bold changes rather than small ones, a 20% effect needs a fraction of the traffic a 3% effect does. Low-traffic sites should redesign, not tune.
Related calculators
Conversion Rate Calculator
Points look small; the revenue effect is not.
OpenSessions to Conversions Calculator
How much traffic a test actually needs.
OpenRevenue per Visitor Calculator
The right metric for an A/B test.
OpenEtsy Fee Calculator
Every Etsy fee on one sale, itemised.
Open