Draft reference — content review pending
Ecommerce Purchase Conversion Rate
The percentage of eligible ecommerce sessions that result in a completed eligible purchase during the selected reporting period.
Business question
How often do eligible ecommerce visits result in a completed purchase?
Formula
Ecommerce purchase conversion rate = completed eligible ecommerce orders ÷ eligible website sessions × 100.
Calculation notes
Define session eligibility, selected attribution rules, reporting period, bot and internal-traffic exclusions, and whether the measure counts orders against sessions. Orders and sessions are different entity types; some businesses may prefer users or checkout sessions as the denominator.
Edge-case guidance
Keep the traffic and order scopes comparable. Document how cross-device journeys, guest checkout, duplicate orders, cancellations, payment failures, and delayed attribution are handled.
Required data
| Input | Type | Status | Available source hints |
|---|---|---|---|
| Completed eligible ecommerce ordersCount of orders that meet the agreed eligibility, completion, attribution, and reporting-period rules. | Number | Required | Ecommerce platform · CRM · Excel · Google Sheets |
| Eligible website sessionsCount of sessions included after applying the agreed bot, internal-traffic, attribution, and period rules. | Number | Required | Ecommerce platform · CRM · Excel |
Interpretation
Use this measure to understand how effectively eligible visits become purchases. Interpret changes with traffic quality, product mix, price, availability, checkout experience, and attribution rules.
Caution
A higher conversion rate can hide lower-quality traffic, reduced reach, or product availability problems. It is not meaningful without stable eligibility and attribution rules.
Implementation recommendation
Document the session and order definitions with the ecommerce owner, then annotate major changes in traffic source, checkout, product availability, and attribution.
Target guidance
Set the first target from comparable historical performance for ecommerce purchase conversion rate, then adjust it for the business model, strategy, capacity, seasonality, data quality, and customer commitments. Review the direction with the accountable owner and consider this trade-off: pursuing conversion alone may reduce reach or encourage unsuitable traffic and discounting.