The gap between “sold for £X” and “kept £Y” is where marketplace sellers win or lose. A seller who estimates fees is pricing blind — one fee change, a regulatory charge they did not see, an enforced ad rate on every sale, can quietly turn a “profitable” listing into a loss. Quick Calc Marketplaces for Windows models every fee that applies to a sale and shows the number that actually decides whether to list: your real profit, and the break-even price below which you should not sell. Quickcalc Buy from the online shop
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It is a self-contained desktop application for Windows that installs in seconds, runs offline, and comes with a 30-day free trial — no account to create, no recurring fees. A one-time licence covers the Windows version.
What Quick Calc models
Quick Calc models 15 fee types across 10 built-in marketplaces: the final-value commission each marketplace takes on a sale; regulatory fees such as eBay’s compliance charge; VAT on fees, handled correctly with a simplified view for home sellers; fixed order and per-item fees — the flat charges added per order or per item; enforced ad fees, the fixed advertising percentage you cannot opt out of on platforms like Etsy; charity donations and top-rated or seller discounts; low-order threshold penalties when an order falls below a set value; category fees for higher-rate categories like electronics or watches; and foreign-sale fees for orders shipped internationally.
That is every fee most sellers know exists but cannot easily track to the penny. Quick Calc puts them all in one calculation.
Ten marketplaces, default rates you can edit
Quick Calc loads default fee values for eBay, Etsy, Shopify, Facebook Marketplace and more, so you start from a realistic baseline rather than a blank form. The defaults are a starting point — you can edit them to match your actual account, because the rates your account experiences are not always the rates quoted in the help pages.
The numbers that matter before you list
When you press Calculate, Quick Calc rolls every cost into the figures that decide whether a listing is worth making: your net sale after all fees, your total costs, your profit, your margin, and the break-even price — the exact price at which the item stops losing money. The break-even price is the single most useful number a seller can have before listing. It is the floor below which a listing loses money, and knowing it before you list is the difference between pricing with your eyes open and pricing blind.
Mini-tools for the what-if questions
Alongside the main calculator, Quick Calc includes focused mini-tools: a VAT tool to add or remove VAT on any figure for invoices and gross-price checks; a margin calculator to work from a cost and desired markup to a sale price and margin; a discount calculator to see instantly what 5%, 10% or 20% off does to a price; and a free shipping calculator to decide whether offering free postage still leaves a profit.
Why not a spreadsheet
A spreadsheet rebuilt for every listing misses fee logic that changes between marketplaces, gets VAT on fees wrong, does not compute break-even automatically, stays static when marketplaces change rates, and has no built-in tools for the what-if questions. Quick Calc keeps the logic in one place, handles VAT on fees correctly, computes break-even automatically, and notifies you of updates with live help and built-in recovery tools.
Quick Calc Marketplaces for Windows is a product of CritchCorp Computers Ltd. The free 30-day trial is fully functional — continued use after the trial requires a licence. Fee and profit figures are estimates based on the values you enter and the rates available at the time; marketplaces change their fees, and actual results vary.
