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Free Shipping Threshold Calculator
Finds the lowest free-shipping threshold that can pay for itself, then compares profit per hundred orders before and after the offer.
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Enter your figures and press Calculate.
In short
Free Shipping Threshold Calculator is a free online tool on inputtesthub.com that finds the lowest free-shipping threshold that can pay for itself, then compares profit per hundred orders before and after the offer. It needs no account, no download and no payment, and there is no daily usage limit. Everything is processed inside your own browser, so the data you paste is never uploaded to a server.
How to use the Free Shipping Threshold Calculator
- Enter your figures in the input fields.
- The result updates as you type, together with the full working.
- Check the breakdown table to see exactly how the number was reached.
About the Free Shipping Threshold Calculator
The Free Shipping Threshold Calculator finds the lowest free-shipping threshold that can pay for itself, then compares profit per hundred orders before and after the offer. It runs as plain JavaScript inside the page, which means there is no upload step, no queue and no size limit imposed by a server — the only limit is your own device.
What people use it for
- Choosing a threshold instead of copying a competitor's.
- Checking whether free shipping over a round number is affordable.
- Seeing how many top-ups the offer needs to break even.
Details
| The floor | Average order + shipping ÷ margin |
|---|---|
| At 45 AOV, 40% margin, 7 postage | About 62.50 |
| Set at the average | Guaranteed to lose money |
| Biggest hidden cost | Orders already over the line |
| Rule of thumb | 15–25% above your average order |
The maths behind it
This tool uses the lowest threshold that can pay for itself is the average order value plus shipping cost ÷ gross margin, because the extra spend has to generate enough margin to cover the postage you gave away. Every intermediate value is shown on screen, so the result can be checked by hand.
The two behavioural inputs — how many orders already clear the threshold and how many will top up — are estimates, and the result is sensitive to both. Run it at a pessimistic top-up rate as well as an optimistic one; if the offer only works at the optimistic figure, it does not work.
Where this tool stops
A single average order value stands in for a whole distribution, which is a real simplification: two shops with the same average can respond very differently. It also assumes shipping cost is flat, ignores any lift in conversion rate from the offer itself, and does not model people who abandon rather than top up.
Frequently asked questions
Where should I set a free shipping threshold?
Above your average order value, never at it. The formula gives a hard floor: average order plus shipping cost divided by gross margin. Below that, even a customer who tops up exactly to the threshold does not generate enough margin to pay for the postage you just stopped charging.
Why does it matter how many orders are already above the threshold?
Because those customers change nothing and now ship free. That giveaway is certain and immediate, while the extra spend from customers topping up is a behavioural guess. A threshold that most of your orders already clear is a straight discount dressed up as an incentive.
Does the Free Shipping Threshold Calculator cost anything?
There is no cost and no cap. The Free Shipping Threshold Calculator is not a demo of a paid product, so nothing is held back or watermarked.
Can you see what I put into this utility?
No. The Free Shipping Threshold Calculator runs entirely in your browser using JavaScript. Because the work happens locally, the utility also keeps working if your connection drops, and closing the tab is all it takes to discard everything.
What formula does the Free Shipping Threshold Calculator use?
It uses the lowest threshold that can pay for itself is the average order value plus shipping cost ÷ gross margin, because the extra spend has to generate enough margin to cover the postage you gave away. The full working is printed under the result, so you can follow every step rather than trusting a black box.
Give me a worked example.
Enter a 45 average order at a 40% margin with 7 postage and the Free Shipping Threshold Calculator returns a 62.50 floor — anything lower cannot recover the shipping from the extra spend.
When would I actually need the Free Shipping Threshold Calculator?
Typical uses: choosing a threshold instead of copying a competitor's. Checking whether free shipping over a round number is affordable. Seeing how many top-ups the offer needs to break even. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
Where does the Free Shipping Threshold Calculator stop being reliable?
A single average order value stands in for a whole distribution, which is a real simplification: two shops with the same average can respond very differently. It also assumes shipping cost is flat, ignores any lift in conversion rate from the offer itself, and does not model people who abandon rather than top up. Knowing where a tool stops being trustworthy matters more than the cases where it works.
What are the key numbers for the Free Shipping Threshold Calculator?
The floor is Average order + shipping ÷ margin. At 45 AOV, 40% margin, 7 postage is About 62.50. Set at the average is Guaranteed to lose money. These are printed on the page itself, so you do not have to take them on trust.
Is the number rounded?
The calculation runs in double precision and the result is shown to ten significant figures, so converting a value and converting it back returns the original. What is displayed is rounded for readability; what is copied is not.
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