Shopping Cart Abandonment Calculator
Most Carts Never Become Orders
A shopper adding an item to a cart is a signal of intent, not a completed sale — and the gap between the two is one of the largest, most trackable leaks in online retail. Cart abandonment rate quantifies exactly how much of that intent evaporates before checkout, turning a vague sense of "we're losing people" into a specific percentage a team can set a target against.
The Formula
The inputs are simple counts over a chosen period — how many carts were created, and how many of those resulted in a completed purchase. Everything else is a byproduct of that one ratio.
Why Track It
- Checkout flow diagnosis — a sudden jump in abandonment rate after a checkout redesign is one of the fastest signals that a UX change hurt conversions.
- Email and retargeting ROI — abandoned-cart recovery campaigns are only worth building once the size of the abandonment problem is quantified.
- Benchmarking over time — tracking the rate month over month shows whether checkout friction is improving or getting worse, independent of overall traffic changes.
Abandonment Rate by Scenario
| Carts created | Completed purchases | Abandoned | Abandonment rate |
|---|---|---|---|
| 1,000 | 300 | 700 | 70.00% |
| 1,000 | 250 | 750 | 75.00% |
| 500 | 175 | 325 | 65.00% |
| 2,000 | 700 | 1,300 | 65.00% |
Figures above are illustrative scenarios computed directly from the calculator's own formula, not measured data from any specific store — enter your own cart and purchase counts to see your actual rate.
How to Use This Calculator
- Enter the total number of Carts Created over the period you're measuring.
- Enter the number of Completed Purchases from those carts.
- Select Calculate to get the abandonment rate and the raw number of abandoned carts.
Related Calculations
Once a purchase completes, see what it's typically worth with the Average Order Value Calculator, or weigh recovery-campaign spend against the Customer Acquisition Cost Calculator.