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Resale calculators for the full sourcing-to-sale workflow.
Start with the decision in front of you: how much to pay, where to list, what offer to accept, or whether the time and inventory investment are producing enough return.
1. Set the sourcing ceiling
Use a realistic expected sale price, fulfillment cost, marketplace profile, and target profit before buying inventory.
Maximum Buy Price CalculatorMost you can pay and preserve target profit.Resale Lot Profit CalculatorEstimate batch profit, ROI, and break-even sold units for a resale lot or wholesale purchase.Target Margin Price CalculatorCalculate the sale price needed for a target margin after percentage fees and fixed per-sale costs.
2. Compare listing economics
Marketplace fees are only one part of the decision. Apply the same item, shipping, packaging, and promotion assumptions to each platform.
Resale Profit CalculatorProfit, margin, ROI, and break-even.eBay Fee CalculatorEstimate fees and net proceeds.Poshmark Fee CalculatorHandle flat and percentage fee thresholds.Mercari Fee CalculatorModel net proceeds after fees and costs.Etsy Profit CalculatorInclude listing, transaction, and processing fees.
3. Protect the offer floor
Calculate the minimum acceptable offer before negotiation, then check shipping weight and labor time before treating a sale as profitable.
Minimum Offer CalculatorLowest sale price that still hits a profit target.Dimensional Weight CalculatorCompare actual and dimensional package weight to estimate the carrier billing weight.Resale Hourly Profit CalculatorEstimate net resale profit per hour after inventory, fees, shipping, supplies, and labor time.
4. Measure inventory performance
Use cost-based inventory metrics consistently. Listing value is not inventory cost and gross sales are not profit.
Resale Inventory Turnover CalculatorCalculate annualized inventory turnover and estimated days inventory remains on hand.Reorder Point CalculatorEstimate when to reorder inventory from daily demand, supplier lead time, and safety stock.Economic Order Quantity CalculatorEstimate an economic order quantity from annual demand, ordering cost, and annual holding cost per unit.