When to use this calculator
Find the share of started shopping carts that did not become completed purchases. Counts should refer to a matched cohort and consistent cart-session rules.
Explore the marketing & customer calculators for other questions in this topic. For a related calculation, use the Click Through Rate Calculator: Calculate advertising clicks as a percentage of recorded impressions.
PUTTING IT INTO PRACTICE
Cart Abandonment Rate: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Carts started (integer) | 1,000 |
| Purchases completed from those carts (integer) | 300 |
| Result | 70 % |
- Check the input labels and enter the example values above.
- Apply the relationship: Abandonment (%) = (started − completed)/started × 100.
- The result is 70 %, rounded for display.
How to interpret your result
Counts should refer to a matched cohort and consistent cart-session rules.
Define the event, audience and attribution window before calculating a rate. Clicks, customers and orders are different units. Acquisition cost and campaign CPA may cover different spending categories.
Frequently asked questions
Should I count unique users or total events?
Use the definition matching your metric. State it consistently because repeat events can produce a different rate from unique people.
When is the cart abandonment rate calculator useful?
Find the share of started shopping carts that did not become completed purchases. Counts should refer to a matched cohort and consistent cart-session rules.
How do I use the cart abandonment rate calculator?
Enter carts started (integer), purchases completed from those carts (integer). The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
Abandonment (%) = (started − completed)/started × 100.
What should I check before using the result?
Counts should refer to a matched cohort and consistent cart-session rules.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
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