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Free Tool

Run the numbers before you buy the flip.

Seller-side estimate only. Real profit will move if fees, discounts, taxes, or labels differ.

Run the math

Pick a marketplace, enter the basics, and see if the deal works.

Calculator

Sale setup

Start with the deal itself: what you paid, what you expect to sell it for, and what shipping will cost you.

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Seller fee assumptions

Preset fee logic will appear here.

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Planning target

Choose the outcome you care about.

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How much profit you want to clear.
Calculator SEO

Marketplace-specific resale math

eBay profit calculator

This calculator treats the eBay preset as a common combined final value fee plus fixed order fee on the total sale amount, including buyer-paid shipping.

eBay fees vary by category and account status, so use this as a practical starting point and then adjust the assumptions if your category runs differently.

Once the item is worth saving, FlipFinds is where you can track the actual numbers across your inventory instead of only the estimate.

Poshmark fee calculator

The Poshmark preset uses the current official U.S. fee structure that reverted on October 24, 2024: $2.95 for sales under $15 and 20% for sales at $15 and above.

That makes Poshmark small-item math behave very differently from percentage-only marketplaces, which is why this preset handles the fee logic for you.

Use FlipFinds when you want the actual item, final sale amount, and real outcome saved after the listing sells.

Mercari profit calculator

The Mercari preset uses the current seller fee structure effective January 6, 2025: a 10% selling fee on item price plus buyer-paid shipping, with no separate payment processing fee for new and updated listings.

This matters because shipping charged to the buyer still affects seller proceeds once the selling fee is applied to that combined amount.

FlipFinds can take over once the item is worth keeping in your sourcing pipeline.

Reseller ROI calculator

Profit alone is not enough when cash is tied up in inventory. ROI helps show whether the flip is actually worth the capital and effort.

Use target profit or target ROI mode to find the minimum sale price you need before you buy, send an offer, or accept one.

When you want to stop doing one-off math and start tracking real business performance, move the item into FlipFinds.