The arithmetic
Conversion rate = conversions ÷ visitors × 100. 1,187 orders from 47,318 sessions is 2.51%.
Where the two numbers come from
In GA4, the Landing page report under Reports → Engagement gives sessions and conversions per landing page, which is the version you want — a site-wide rate hides the fact that one page converts at 6% and the rest at nothing.
In Shopify it is the Sessions by landing page report, which carries a conversion rate column per page.
One thing to settle before you start comparing months: sessions and users are not the same denominator. Sessions counts visits, so one person returning three times is three sessions. Users counts people. GA4 defaults to sessions in most reports, Shopify reports sessions too, and mixing a session-based rate with a user-based rate is how you get a conversion rate that moved without anything actually changing.
What a lift is worth
A store at 2.51% wants 3%. Same traffic, 47,318 sessions:
| At 2.51% | At 3.00% | |
|---|---|---|
| Orders | 1,187 | 1,420 |
| Extra orders | — | +233 |
233 orders at a $68 average order value is about $15,800 of revenue from traffic you already paid for. Compare that to what 233 extra orders would cost in ad spend at your current CAC — improving the rate is usually the cheaper of the two, which is why CRO gets funded.
The same effect runs backwards into acquisition cost. If you pay $18,000 for 60,000 clicks, a 2.51% rate gives you 1,506 customers at $11.95 each. A 3% rate gives 1,800 at $10.00 each, with no change in spend.
If your conversion is a lead, not an order
A landing page converting at 5% on 2,000 visitors produces 100 leads. If 60% qualify and 20% of those close, that is 12 deals:
| Stage | Count | Rate |
|---|---|---|
| Landing page visitors | 2,000 | — |
| Demo form submits | 100 | 5.0% |
| Qualified | 60 | 60% of leads |
| Closed | 12 | 20% of qualified |
Landing conversion drives cost per lead; close rate drives CAC. Whichever stage is furthest below its own normal is the one to work on — a landing page problem and a sales problem look identical in the final number.
Not the same as CTR
CTR is clicks ÷ impressions and stops at the click. Conversion rate starts after it. High CTR with a low conversion rate usually means the ad promised something the page did not deliver, which is a landing page fix, not a creative one. The CPM & CPC calculator handles the ad side.
For the full chain from click to profit, AOV and LTV:CAC take it from here.