About the Free Shipping Threshold Calculator
This free shipping threshold calculator answers two questions online stores ask before launching a "free shipping over $X" offer: what is the lowest minimum that does not cost you money, and what happens to monthly profit at the threshold you have in mind? Enter your average order value, gross margin, what shipping really costs you and what customers pay today, then test a threshold.
It is built for Shopify, WooCommerce and Etsy store owners, ecommerce managers and marketers planning a promotion. The break-even threshold tells you how much extra merchandise a customer must add so the extra gross profit replaces the shipping fee you stop collecting. The profit model then lets you plug in how many orders you expect to clear the threshold and any lift in order volume.
The model is deliberately simple: orders that qualify are assumed to land at the threshold (or stay at their old value if that was already higher), while orders below it keep paying the current shipping charge. Real customers vary, so treat the result as a planning estimate and confirm it with an A/B test or a before-and-after comparison.
With the default inputs, the break-even free shipping threshold is $92.38. Change any value above to recalculate instantly.
How to use the free shipping threshold calculator
- 1Enter your current average order value and gross margin.
- 2Enter what shipping costs you and what customers currently pay for it.
- 3Read the break-even threshold — the minimum that keeps per-order profit unchanged.
- 4Enter a threshold to test, the share of orders you expect to reach it and any order lift.
- 5Compare monthly profit before and after, then adjust the threshold.
Formula and method
When an order qualifies for free shipping you stop collecting the shipping fee F but still pay the carrier S. To stay as profitable as before, the order must carry extra merchandise whose gross profit equals F, which means adding F ÷ m in sales at margin m. Adding that to today’s average order value gives the break-even threshold.
For the monthly model, total orders grow by the expected lift. The chosen share of orders is assumed to reach the threshold T (or keep its old value if higher) and ship free; the rest keep paying the current shipping charge. Gross profit here means product margin plus shipping collected minus shipping paid — fixed costs and advertising are not included.
- AOV
- Current average order value (products only)
- m
- Gross margin as a decimal
- F
- Shipping fee customers pay today
- S
- Your actual shipping cost per order
- T
- Free shipping threshold being tested
Worked examples
$75 AOV store testing free shipping over $90
Giving up a $6.95 fee at a 40% margin needs $17.38 more in sales, so break-even is $92.38. Orders rise 5% to 1,050 and 472.5 reach $90, each earning $28 versus $28.95 before; the extra 50 orders more than cover that, lifting monthly gross profit by about $999.
Store that already absorbs shipping
If customers pay nothing for shipping today, a free shipping message gives nothing away, so break-even equals the $60 AOV. Qualifying orders keep their $60 value, and profit stays at 500 × ($30 − $7) = $11,500.
Threshold set too low
At a 30% margin, replacing a $5 fee takes $16.67 of extra sales, so break-even is $56.67. A $45 threshold adds only $1.50 of margin per qualifying order while giving up $5, so even with 2% more orders profit falls from $22,000 to $18,870 — $3,130 a month.
Frequently asked questions
How do I calculate a free shipping threshold?+
A common starting point is break-even: take your average order value and add the shipping fee you will stop charging divided by your gross margin. With a $75 AOV, $6.95 shipping and a 40% margin, that is $75 + $17.38 = $92.38.
Should my free shipping minimum be above my average order value?+
Usually yes. A threshold somewhat above AOV encourages customers to add items to qualify, which raises order value. A threshold below AOV mostly gives free shipping to orders that would have happened anyway.
Does free shipping increase conversion rates?+
Unexpected shipping costs are one of the most commonly cited reasons for abandoned carts, so free shipping often lifts conversion. The size of the effect differs by store, which is why the calculator lets you enter your own expected order lift.
What if my margin is too low for free shipping?+
Low margins push the break-even threshold far above AOV. Options include raising product prices slightly to build in shipping, offering free shipping only to members, or negotiating cheaper carrier rates to reduce your shipping cost.
Is gross profit the same as net profit here?+
No. The calculator uses product margin plus shipping collected minus shipping paid. It ignores fixed overheads, payment fees and advertising, which do not usually change much with a free shipping threshold.
Results are estimates for educational purposes and are not financial advice. Rates, fees and terms vary — confirm with your lender or a licensed advisor before making decisions.