What this calculator does
Calculate the marketplace selling price required for a target dollar profit, profit margin, or markup after fees and costs.
How it works
The calculator evaluates price − percentage fee − fixed fee − costs = target profit. Inputs are checked before calculation, and invalid values such as zero denominators or out-of-range selections produce a clear error instead of a misleading result.
Input query strings and outputs
Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.
Input query strings
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?itemCost=Item costMoney · Required · Default: 40
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?otherVariableCosts=Shipping and other per-sale costsMoney · Required · Default: 10
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?fixedMarketplaceFee=Fixed marketplace feeMoney · Required · Default: 0.3
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?percentMarketplaceFee=Marketplace fee on selling pricePercentage · Required · Default: 13.25
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?targetType=Profit targetChoice · Required · Default: margin · Accepted values: dollars, margin, markup
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?targetValue=Target valueNumber · Required · Default: 20
Outputs
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requiredSellingPriceRequired selling priceCurrency · Primary output
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netProfitNet profit after entered costsCurrency
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netMarginNet profit marginPercentage
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markupMarkup on item + variable costsPercentage
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marketplaceFeesMarketplace feesCurrency
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breakEvenPriceBreak-even selling priceCurrency
Inputs and results
The inputs are Item cost, Shipping and other per-sale costs, Fixed marketplace fee, Marketplace fee on selling price, Profit target, Target value. Results include Required selling price, Net profit after entered costs, Net profit margin, Markup on item + variable costs, Marketplace fees, Break-even selling price.