Selling Price Calculator

Enter your costs and the profit or margin you want. Pick a platform's fees or type your own percent and fixed fee to get the price to list.

This selling price calculator works out the lowest price to list an item at so that what you keep after fees, item cost, shipping and other costs meets the profit or margin you want. You enter a target profit in dollars or a target margin in percent, along with your item cost, the shipping you charge, your postage and any other costs. Choose a platform such as eBay, Mercari or Poshmark, or enter a custom fee of a percent plus a fixed amount per order. The result shows the item price to list, the fees, what you receive, your profit and margin, and the break-even item price. The tool runs in your browser, is free and needs no sign-up, and nothing you type is uploaded. Fee rates were read on the dates shown in the calculators, so check each platform’s own fee page before you list.

How to use the Selling Price Calculator

Choose a platform from the list. eBay (most categories) is the default. You can also pick a preset: eBay $15 profit, Mercari 30% margin, Poshmark $20 profit, Custom 12% + $0.50, Amazon clothing 35% margin or Stripe card $20 profit.
Choose the goal. Profit mode asks for the dollar amount you want to keep. Margin mode asks for a percent of the total the buyer pays, and the percent must be under 100.
Enter your target profit or target margin.
Enter your item cost, what the item costs you.
Enter the shipping you charge the buyer, and your postage, what you pay to send the item.
Enter any other costs per sale. The default is $0.
If you chose the Custom model, enter the percent fee and the fixed fee per order. Tick “Percent fee also applies to shipping” only if the platform takes its percent on the shipping the buyer pays as well as the item price.
Read “Item price to list (buyer pays shipping)”. If you charge shipping, also read “Item price with free shipping”.
Check “Buyer pays in total”, “Total fees”, “You receive”, “Profit”, “Margin”, “Effective fee rate”, “Break-even item price” and “Profit at the free-shipping price”.
If a message appears instead of results, the calculation has stopped. Check your target, costs and fee values.

Presets fill in a platform and a target in one step, and you can change any field after choosing one.

How does a selling price calculator work?

A selling price calculator starts from the profit or margin you want and works backward to the item price. This is also called a reverse fee calculator, because the fee is worked out in reverse from your target. The tool searches for the lowest price, to the cent, that still reaches your target after fees, item cost, shipping and other costs. It uses bisection, a method that narrows the range of possible prices by halving it again and again, and it checks each candidate price with the same fee function used for the platform’s fee calculator on this site.

How are marketplace fees calculated in this tool?

The Custom model uses a simple formula: fee equals a percent of the sale plus a fixed fee per order, rounded to the cent. If “Percent fee also applies to shipping” is ticked, the percent is taken on the item price plus the shipping the buyer pays. If it is not ticked, the percent is taken on the item price only. The platform models use the same function, with each platform’s own rates. Fee results are calculated from your inputs and the rates published on the platform’s page on the date shown. The Depop, Whatnot and Reverb rates come only from search-result extracts of those platforms’ help pages, not from reading the full pages, so check each platform’s own page before you rely on them. Rates change.

What is the difference between profit and margin?

Profit is the dollars left after fees, item cost, other costs and your postage are subtracted from what the buyer pays. In profit mode, the tool makes sure this figure is at least the dollar amount you enter. Margin is profit shown as a percent of the total the buyer pays, which is the item price plus the shipping the buyer pays. In margin mode, the tool makes sure profit is at least the percent you enter of that total.

What does break-even item price mean?

The break-even item price is the lowest price whose profit is at least $0, using the same shipping and costs you entered. Any price above it covers all your costs on that sale. Break-even is useful for judging how far your price can drop, such as during a sale, before you start to lose money on each item.

Sources (checked 16 October 2026): ebay.com · sell.amazon.com · mercari.com · poshmark.com · depop.com · help.whatnot.com · help.reverb.com · paypal.com · stripe.com · shopify.com

Worked examples

Input	Result
eBay, target profit $15.00, item cost $15.00, shipping charged $8.00	List at $36.44 for a profit of $15.00
Mercari, target margin 30%, item cost $15.00, shipping charged $8.00	List at $30.33 for a profit of $11.50
Poshmark, target profit $20.00, item cost $10.00, shipping charged $0.00	List at $37.50 for a profit of $20.00
Custom percent + fixed fee, target profit $10.00, item cost $20.00, shipping charged $8.00	List at $35.75 for a profit of $10.00
Amazon (referral fee only), target margin 35%, item cost $6.00, shipping charged $0.00	List at $10.67 for a profit of $3.74

Calculated by the tool above; open it with the same values to see each step.

Frequently asked questions

Why does the result sometimes show more than one price that works?

Poshmark’s fee falls from a percentage to a flat amount below $15. Near $15, the answer is the lowest price that reaches your target, which is not necessarily the only one.

Are Depop, Whatnot and Reverb rates confirmed?

No. Those rates are taken only from search-result extracts of each platform’s help page, not from reading the full page. The tool repeats this in a warning when one of them is chosen, so check the platform’s own page before you rely on the result. Rates change.

Does the tool include Amazon FBA costs?

No. There are no FBA costs in the Amazon model. The Amazon model uses the Professional plan at 100 items a month and the Toys and Games rate or the category you choose.

Are payment service fees included?

The page shows a payment-service note for PayPal, Stripe and Shopify. The Shopify monthly plan price is not included in the results.

Why did my calculation stop with a message?

The tool stops and shows a message when no price up to $100,000 reaches your target, for example when a margin is higher than the fees allow. It also stops for a blank target, a negative cost, a margin of 100 or more, a custom fee of 100% or more, or an unknown category.

Is my data sent anywhere?

No. The tool runs in your browser, and nothing you enter is uploaded.

Marketplace Fee and Profit Calculators: use when you want every fee calculator on this site in one list.
eBay Price Calculator: use when you want a listing price worked out for eBay in particular.
eBay Fee Calculator: use when you want to see the fees on an eBay sale at a price you choose.
eBay Profit Calculator: use when you want the profit left after eBay fees and costs at a price you choose.
Marketplace Fee Calculator: use when you want to compare fees across several platforms side by side.
Amazon Referral Fee Calculator: use when you sell on Amazon and want the referral fee.
Amazon FBA Profit Calculator: use when you sell through Amazon and want to add FBA costs this tool does not include.
Mercari Fee Calculator: use when you want the Mercari fee on its own.
Poshmark Fee Calculator: use when you want the Poshmark fee on its own.
Depop Fee Calculator: use when you want the Depop fee, keeping in mind its rates come from search-result extracts.

Updated October 2026