Cart Abandonment Rate Calculator

How it is calculated

The tool counts every cart that did not end in a purchase: abandoned = S − C and rate = (S − C) ÷ S × 100. S is the number of carts started in the period and C is the number of those that ended in a completed order. Both are plain counts for the same period and the same traffic scope. S must be above zero, and C cannot be negative or larger than S; in those cases the tool shows no result. Entering C equal to S is valid and gives 0.00%. The rate is shown as a percentage with two decimals, together with the number of abandoned carts. The tool measures carts, not visitors, so one shopper who opens two carts counts twice.

Common mistakes

• Dividing by visitors or sessions instead of by carts created, which gives a conversion rate rather than an abandonment rate.
• Counting orders that were later cancelled or refunded as completed, which makes abandonment look lower than it is.
• Mixing periods, for example this month's completed orders against carts started over the last 30 days — a cart opened on the 29th may finish next month.
• Typing the abandonment percentage into the completed field, or the other way round; the second field must be a count of completed purchases, and a number larger than the carts started gives no result.
• Comparing your figure with another shop's without checking how they define a cart; some count only carts that reached checkout.