Conversion Rate (CR): How to Calculate and Interpret It
Conversion (CR, conversion rate) is the share of visitors who performed a target action: application, registration, purchase. It is calculated simply: target actions divided by visits and multiplied by one hundred. The complexity lies in what is considered an action and from what base.
Why Numbers Vary
| Calculation Base | What You Get |
|---|---|
| From all site visits | The lowest and most honest number |
| From visits to the landing page | Assessment of the page's performance |
| From unique visitors | Higher than from visits |
| From those who reached the form | Assessment of the form, not the channel |
When someone mentions conversion without specifying the base, the number means nothing. The same applies to comparisons with the “industry average”: it is unknown what and from what was counted there.
Micro and Macro Conversions
Macro conversion is what the site exists for: application, payment. Micro conversions are steps towards it: subscription, adding to cart, going to prices. There are many more micro conversions, and they show faster that changes are working, even before sales statistics accumulate.
What Affects Conversion for SEO Traffic
- Match with Intent. Traffic from informational queries converts worse than from transactional ones — see search intent.
- Speed and Mobile Layout. A slow form loses applications without any SEO.
- Trust. Prices, terms, contacts, reviews — what most service pages lack.
- Clarity of the Next Step. One clear button works better than three equivalent ones.
How Much Data is Needed
With a conversion rate of about 2% and a hundred visits per week, the difference between 2% and 3% is statistically indistinguishable. Before drawing conclusions about the impact of changes, accumulate at least several dozen target actions — otherwise, you are reading noise.
Conversion and Seasonality
The same site converts differently in different months: the audience composition changes, not the quality of the pages. Therefore, it is correct to compare either with the same period last year or with a neighboring period with an unchanged traffic structure.