What Is a Cart Abandonment Rate Calculator?
A Cart Abandonment Rate Calculator measures the percentage of shopping carts or checkout sessions that were started but did not result in a completed purchase.
The metric is commonly used by ecommerce stores and other online businesses to understand how many potential purchases are being lost after a shopper has already shown buying intent.
How to Use the Cart Abandonment Rate Calculator
Enter Initiated Carts
Add the total number of carts or checkout processes started during your selected period.
Enter Completed Orders
Add the number of those carts that resulted in successful completed purchases.
Review Abandonment
Calculate abandonment rate, completion rate, abandoned carts, and optional target comparison.
Cart Abandonment Rate Formula
First, calculate the number of abandoned carts:
Then divide abandoned carts by all initiated carts and multiply by 100:
Cart Completion Rate Formula
If every initiated cart is classified as either completed or abandoned, the completion rate and abandonment rate add up to 100%.
Cart Abandonment Calculation Example
Suppose an ecommerce store records 5,000 initiated shopping carts and 1,500 completed purchases during one month.
| Metric | Example |
|---|---|
| Initiated Carts | 5,000 |
| Completed Purchases | 1,500 |
| Abandoned Carts | 3,500 |
The abandonment rate would be:
The cart completion rate would therefore be:
What Is an Abandoned Cart?
An abandoned shopping cart generally refers to a situation where a shopper starts a cart or checkout process but does not complete the transaction.
The exact definition can vary by analytics platform. Some systems count a cart when a product is added, while others measure abandonment after checkout has begun. For accurate reporting, use the same definition when comparing different time periods.
Cart Abandonment Rate vs. Checkout Completion Rate
| Metric | What It Measures | Formula |
|---|---|---|
| Cart Abandonment Rate | Percentage of initiated carts that did not become purchases. | Abandoned Carts ÷ Initiated Carts × 100 |
| Cart Completion Rate | Percentage of initiated carts that became completed purchases. | Completed Purchases ÷ Initiated Carts × 100 |
Estimated Abandoned Cart Value
If you enter an average cart value, the calculator can estimate the total value represented by abandoned carts.
This figure represents potential order value rather than guaranteed recoverable revenue. Many abandoned carts would not necessarily have converted even if changes were made to the checkout experience.
Comparing Cart Abandonment With a Target
The optional target abandonment rate lets you estimate how many additional carts would need to convert for your current traffic to reach a selected target.
When an average cart value is provided, the calculator also estimates the order-value opportunity associated with closing that gap.
Why Cart Abandonment Rate Matters
Shoppers who reach the cart or checkout stage have typically demonstrated stronger purchase intent than general website visitors. Tracking abandonment can therefore provide useful insight into friction near the end of the buying process.
Changes in abandonment rate can be reviewed alongside checkout design, shipping costs, payment options, site performance, promotions, device type, traffic source, and customer behavior.
Common Reasons Shoppers Abandon Carts
- Unexpected shipping, tax, or additional checkout costs.
- A checkout process that feels too long or complicated.
- Required account creation before purchasing.
- Limited payment or delivery options.
- Website errors, slow pages, or mobile usability problems.
- Customers comparing prices before making a final decision.
- Delivery times that do not match customer expectations.
- Shoppers using the cart to save products for later.
Ways to Analyze Cart Abandonment
A single overall abandonment rate is useful, but segmented analysis can reveal where meaningful differences occur. Businesses may compare abandonment by:
- Mobile, desktop, and tablet devices.
- New customers versus returning customers.
- Paid, organic, social, email, or referral traffic.
- Product category or cart value.
- Country, region, or shipping destination.
- Payment method.
- Checkout step.
- Promotional and non-promotional periods.
Cart Abandonment and Revenue Opportunity
Estimating the value associated with abandoned carts can help provide context, but it should not be treated as guaranteed lost revenue.
Some shoppers intentionally leave without purchasing, return later, compare alternatives, or use a shopping cart as a saved list. For this reason, revenue opportunity should be treated as an estimate rather than a forecast.
Frequently Asked Questions
What is cart abandonment rate?
Cart abandonment rate is the percentage of initiated shopping carts or checkout sessions that do not result in a completed purchase.
How do you calculate cart abandonment rate?
Subtract completed purchases from initiated carts, divide the result by initiated carts, and multiply by 100.
What is cart completion rate?
Cart completion rate is the percentage of initiated carts that result in completed purchases. Divide completed purchases by initiated carts and multiply by 100.
What is an abandoned cart?
An abandoned cart is generally a shopping cart or checkout process that was started but did not result in a completed transaction.
How do I calculate the number of abandoned carts?
Subtract completed purchases from the number of initiated carts.
What is estimated abandoned cart value?
It is the number of abandoned carts multiplied by the average cart value you enter. It estimates the value represented by those carts, not guaranteed recoverable revenue.
Can Shopify or WooCommerce stores use this calculator?
Yes. The calculator can be used with data from Shopify, WooCommerce, Magento, custom ecommerce stores, marketplaces, or other platforms as long as you have comparable cart and order counts.
Why should carts and purchases use the same period?
Using the same reporting period keeps the calculation comparable. For example, monthly initiated carts should be compared with completed purchases from the same month.
Does reducing abandonment guarantee more revenue?
No. Lower abandonment may improve conversion, but not every abandoned cart would otherwise have become a purchase. Revenue estimates should therefore be treated as potential opportunity rather than guaranteed income.