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Marketplace Fee Calculator
Works out what you actually keep after marketplace commission, payment processing and shipping, with presets for eBay, Etsy, Amazon and Mercari.
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In short
Marketplace Fee Calculator is a free online tool on inputtesthub.com that works out what you actually keep after marketplace commission, payment processing and shipping, with presets for eBay, Etsy, Amazon and Mercari. 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 Marketplace Fee 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 Marketplace Fee Calculator
The Marketplace Fee Calculator works out what you actually keep after marketplace commission, payment processing and shipping, with presets for eBay, Etsy, Amazon and Mercari. 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
- Checking whether a sale is worth making before you list it.
- Comparing the same item across two marketplaces.
- Finding the price that leaves the profit you actually want.
Details
| eBay | 13.25% plus 30c, charged on shipping too |
|---|---|
| Etsy | 6.5% plus 3% + 25c payments plus a 20c listing fee |
| Mercari | 10% plus 2.9% + 50c |
| Poshmark | A flat 2.95 under 15, then 20% |
| Own store | Card processing only, typically 2.9% + 30c |
The maths behind it
This tool uses payout = item + shipping charged − commission − payment processing − listing and ad fees, and profit is that payout minus what the item and the postage cost you. Every intermediate value is shown on screen, so the result can be checked by hand.
The rates built in are US general-merchandise defaults and every marketplace changes them, sometimes twice a year and often by category and by country. The override fields exist for exactly that reason — put your own numbers in and the maths is yours rather than this page's.
Where this tool stops
It models one sale. Subscription costs, store fees, monthly plans, international levies, currency conversion spreads and category-specific rates are not included, and any of them can matter more than the commission on a low-priced item.
Explained in our guides
All guidesFrequently asked questions
Do marketplaces charge commission on shipping?
eBay, Etsy, Amazon and Mercari all charge their percentage on the order total, which includes the shipping the buyer paid. That is why offering free shipping and building the postage into the price costs you the same commission either way — the fee follows the money, not the label.
Why can a 14.99 Poshmark listing net more than a 15.00 one?
Poshmark charges a flat 2.95 below 15 and 20% at 15 and above. At 14.99 you keep 12.04; at 15.00 the 20% takes 3.00 and you keep 12.00. You have to price at 15.05 before you are level again, so everything between 15.00 and 15.05 is worth less to you than 14.99 is. Switch the preset to Poshmark and try both.
Does the Marketplace Fee Calculator cost anything?
No charge and no sign-up. There is no free tier to run out of because there is no paid tier — inputtesthub.com is funded by advertising rather than by metering the tool.
Does anything I enter leave my computer?
No. The Marketplace Fee Calculator runs entirely in your browser using JavaScript. Because the work happens locally, the tool also keeps working if your connection drops, and closing the tab is all it takes to discard everything.
Can I check the maths myself?
It uses payout = item + shipping charged − commission − payment processing − listing and ad fees, and profit is that payout minus what the item and the postage cost you. The full working is printed under the result, so you can follow every step rather than trusting a black box.
Can you show an example?
Enter a 120 item with 8 shipping on eBay, costing you 45 plus 9 postage and the Marketplace Fee Calculator returns about 17.26 in fees, a 110.74 payout and 56.74 profit.
What problem does the Marketplace Fee Calculator solve?
In practice it gets used for three things: checking whether a sale is worth making before you list it. Comparing the same item across two marketplaces. Finding the price that leaves the profit you actually want. It is built for exactly those cases rather than being a general-purpose tool with this bolted on.
When is the Marketplace Fee Calculator not the right tool?
It models one sale. Subscription costs, store fees, monthly plans, international levies, currency conversion spreads and category-specific rates are not included, and any of them can matter more than the commission on a low-priced item. Knowing where a tool stops being trustworthy matters more than the cases where it works.
Which values should I know?
EBay is 13.25% plus 30c, charged on shipping too. Etsy is 6.5% plus 3% + 25c payments plus a 20c listing fee. Mercari is 10% plus 2.9% + 50c. These are printed on the page itself, so you do not have to take them on trust.
Can I rely on this for exact work?
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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