Free Shipping Threshold Calculator

Free shipping is one of the most powerful conversion levers in ecommerce, but it comes at a real cost that many brands fail to quantify. Offering free shipping without understanding its margin impact is like running a permanent discount that nobody tracks. This calculator models the full economics of shipping cost strategies by comparing your current model against a free-shipping threshold scenario.

The key insight is that free shipping thresholds work as an AOV lever. When you set a threshold of $75 on a store with a $65 AOV, a meaningful percentage of customers will add items to their cart to qualify. Industry data suggests AOV lifts of 10 to 20 percent are typical when thresholds are set 15 to 25 percent above current AOV. But the lift has to be large enough to offset the cost of absorbing shipping on qualifying orders.

This tool calculates contribution margin per order under both scenarios, accounting for COGS, shipping cost absorption, and the revenue lift from higher AOV. It shows you the exact margin impact in dollars per order and helps you find the sweet spot where the AOV lift more than compensates for the shipping cost absorption. For most DTC brands, the optimal threshold sits between 1.2x and 1.5x current AOV. Too low and you absorb shipping cost without meaningful AOV lift. Too high and customers ignore it entirely.

Before changing your shipping strategy, run the numbers here. A well-set threshold can increase both revenue and margin simultaneously. A poorly-set one just transfers money from your margin to your carrier.