Work backwards from what you want
Pricing usually runs the wrong way round: pick a price, discover the payout. Name the payout instead and this solves for the price that produces it, on every platform.
What you want to end up with
Your costs
To end up with $50.00 in your account, you have to charge $50.00 on Vinted and $62.50 on Poshmark — a difference of $12.50 in what the buyer sees.
Prices are the item price, rounded up to the cent so you are never left a penny short. “Uplift” is how much more the buyer pays than the amount you wanted to keep. Platforms are priced on their default settings; Shopify’s monthly plan fee is not included, because no single sale carries it.
How the number is found
Not by algebra. Several of these fee structures have steps in them — eBay’s per-order fee changes at $10, its final value fee bands at $7,500 — so the fee is a piecewise function with no clean inverse. Reaching for a formula here is how calculators end up quietly wrong either side of a threshold.
Instead the solver brackets the answer and halves the interval until it closes, then rounds the price up to the cent. Rounding up matters: round to nearest and you can land a penny under the amount you asked to keep, which is precisely the failure the page exists to prevent.
When a target cannot be reached at any price, the row says so rather than printing a number. That happens when a platform’s percentage take grows faster than the price does.
These calculators are free, and they stay free
There is no account, no email wall and nothing for sale here, which is deliberate — it is what lets the site publish what platforms actually charge and link to where each rate came from. Re-reading ten fee schedules every week is the unglamorous part, and it is what keeps the numbers worth trusting. If that saved you a bad listing decision, you are welcome to put a little toward the domain and the hosting. If it did not, please do not.
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