Hong Life CalculatorsUnderstanding the cart abandonment rate calculator — concept and principle
Cart abandonment rate is the share of online shopping carts that are created but never turned into a completed order. Store owners and marketers track it to see how much demand leaks out between "add to cart" and a finished order. The calculator works with any currency.
How it is calculated
Abandonment rate = (1 − completed orders ÷ carts created) × 100
Revenue left in carts = (carts created − completed orders) × average order value
- Carts created: sessions or users that added at least one item to the cart in the period.
- Completed orders: purchases finished in the same period.
- Average order value (AOV): average revenue per completed order, used to put a money value on the abandoned carts.
The principle
Every cart either ends in an order or is abandoned, so the abandonment rate is simply the complement of the cart-to-order conversion rate. If 30% of carts convert, the other 70% are abandoned. Multiplying the abandoned carts by AOV gives a rough upper bound of the revenue sitting in unfinished carts. It is an upper bound because it assumes an abandoned cart would have been worth as much as a typical order, and many abandoned carts were never serious purchase intentions in the first place.
Worked example
- Inputs: 1,800 carts created, 540 completed orders, AOV $70.
- Conversion of carts: 540 ÷ 1,800 = 0.30.
- Abandonment rate: (1 − 0.30) × 100 = 70%.
- Abandoned carts: 1,800 − 540 = 1,260.
- Revenue left in carts: 1,260 × $70 = $88,200.00.
How to read the result
Large industry studies, such as the figures compiled by the Baymard Institute, put the average documented online cart abandonment rate at roughly 70%, so the default result is close to typical. Mobile traffic usually abandons more than desktop. A rate well above your own history points to friction: surprise shipping costs, forced account creation, a long form or limited payment options. Do not try to read the "revenue left in carts" as money you can fully recover; a realistic recovery campaign wins back only a small fraction of it.
Common mistakes
- Counting carts and orders over different date ranges or different channels.
- Including orders placed without a cart (for example, "buy now" buttons), which can push the rate below its true value.
- Treating the revenue figure as a forecast instead of an upper bound.
Frequently asked questions
What is a good cart abandonment rate?
There is no universal target. Measure your own baseline and aim to reduce it; even a few points lower can be a meaningful revenue gain.
Is cart abandonment the same as checkout abandonment?
No. Checkout abandonment counts only shoppers who started the checkout and left, so it is usually lower than cart abandonment.
Why can the rate come out negative?
That happens when completed orders exceed carts, usually because some orders bypass the cart or the two numbers come from different sources.
Sources: Baymard Institute, Cart Abandonment Rate Statistics (research compilation) · Farris, Bendle, Pfeifer & Reibstein, Marketing Metrics (Pearson)