Financial Calculators for Resellers
Calculate fees, profits, and break-even prices across platforms. Compare options, open the live tools, and use Underpriced to make faster sourcing and pricing decisions.
Why financial calculators tools matter
Financial Calculators decisions compound fast in a resale business. A small mistake in this part of the workflow can quietly drag down margin, slow turnover, or create extra customer-service work that never shows up in your sourcing spreadsheet.
This category focuses on calculate fees, profits, and break-even prices across platforms. The goal is to turn repeat judgment calls into a faster, more consistent process so you are not rebuilding the same estimate every time you list, ship, or evaluate inventory.
If you are new to these tools, start with one calculator that solves the bottleneck right in front of you, then use the related guides to understand how experienced resellers apply the result. Featured tools in this category include Platform Fee Calculator, Shopify Profit, Inventory Carrying Cost, Gold Resale Value, Silver Melt Value, Silver Wholesale Checker.
- Calculate Poshmark fees around the $15 threshold, compare eBay managed-payment profit with PayPal, and audit Mercari and marketplace payouts.
- Calculate Shopify net profit after plan cost, payment fees, COGS, shipping, packaging, marketing, apps, discounts, and return reserves.
- Calculate annual and monthly inventory carrying cost, build a transparent holding-cost rate, and compare holding an unsold item with selling it now.
- Calculate a USD gold melt floor from weight, karat, non-gold weight, dated spot, and payout rate, then compare up to three actual buyer offers.
- Calculate scrap sterling silver value from weight, purity, a current spot or buyer quote, payout rate, and a resale-net comparison.
- Vet a wholesale 925 silver supplier and calculate the maximum order price after freight, assay risk, defects, sell-through, fees, and target profit.
Tools in this category
eBay & PayPal Fee Calculator + Mercari Comparison 2026
Calculate Poshmark fees around the $15 threshold, compare eBay managed-payment profit with PayPal, and audit Mercari and marketplace payouts.
Shopify Profit Calculator for Resellers [2026]
Calculate Shopify net profit after plan cost, payment fees, COGS, shipping, packaging, marketing, apps, discounts, and return reserves.
Inventory Carrying Cost Calculator for Resellers
Calculate annual and monthly inventory carrying cost, build a transparent holding-cost rate, and compare holding an unsold item with selling it now.
Gold Resale Value & Buyer Payout Calculator
Calculate a USD gold melt floor from weight, karat, non-gold weight, dated spot, and payout rate, then compare up to three actual buyer offers.
Scrap Sterling Silver Value Calculator: 925 Melt
Calculate scrap sterling silver value from weight, purity, a current spot or buyer quote, payout rate, and a resale-net comparison.
Wholesale Sterling Silver Buy-Ceiling Checker
Vet a wholesale 925 silver supplier and calculate the maximum order price after freight, assay risk, defects, sell-through, fees, and target profit.
StockX vs GOAT Payout Calculator 2026: Sneaker Fees
Compare StockX and GOAT seller fees, cash-out costs, and net payout. Enter your buy cost to estimate sneaker resale profit.
PayPal G&S Fee Calculator 2026: Fees & Payout
Calculate PayPal Goods and Services, Checkout, Venmo, card, QR, and international fees, then see the expected net payout.
Break-Even Price Calculator 2026: Cover Costs & Labor
Calculate the resale price that covers item cost, seller-paid shipping, supplies, risk reserve, platform fees, labor value, and offer buffer.
FBA Storage Fee Calculator 2026: Storage & Aged Inventory
Estimate Amazon FBA monthly storage, aged-inventory surcharge exposure, removal break-even, and sell-through risk before sending inventory.
Depop Fee Calculator 2026: Payout, Bundles & Boost
Calculate Depop payout by seller region, processing fee, Boost, buyer shipping, tax, seller-paid shipping, bundle count, and break-even price.
Reseller Credit Card Rewards Calculator: Net Points ROI
Calculate reseller credit card rewards after platform fees, interest, annual-fee allocation, redemption value, and resale profit. Free calculator included.
eBay Promoted Listings ROI Calculator 2026
Model eBay Promoted Listings General ad fees on total sale amount, then calculate per-sale profit, break-even view lift, and max safe ad rate.
Reseller Tax Deduction Calculator 2026: After-COGS
Estimate Schedule C net income after COGS, fees, shipping, supplies, mileage, home office, 1099-K reconciliation, and self-employment tax.
Discount Stacking Calculator: Coupons, Tax & Cashback
Model retail arbitrage buy cost after sale discounts, coupons, sales tax, cashback, card rewards, rebates, quantity, and resale fees.
Margin vs Markup Calculator for Reseller Pricing
Convert margin, markup, and multipliers, then check whether fees, fixed costs, and seller-paid shipping still leave the target net margin.
Reseller ROI Calculator: Net Profit, Velocity, and Max Buy Price
Calculate reseller ROI after fees, buyer shipping, seller shipping, packing, reserve, labor, hourly target, days to sell, and target buy price.
Sales Tax Calculator for Reseller True COGS
Estimate reseller inventory COGS after discounts, state average sales tax, exact rate overrides, resale certificate status, and purchase-use guardrails.
Flip Profit Calculator 2026: Net Profit After Fees
Calculate net profit, ROI, margin, break-even price, and target sale price after marketplace fees, shipping, reserves, and labor. Free calculator included.
Whatnot Fee Calculator 2026: Fees, Payout, Floor Price
Calculate Whatnot commission, processing, seller-covered shipping discounts, net profit, and live-auction floor price before a show.
Offer Acceptance Calculator: Accept, Counter, or Wait
Decide whether to accept, counter, or wait on a reseller offer after fees, shipping, holding time, target profit, and ROI floor. Free calculator included.
Electronics Resale Value Calculator: Sold Comps vs Trade-In
Compare used electronics sold comps with trade-in offers. Include fees, battery health, device locks, accessories, and condition to estimate net value.
Wholesale Profit Calculator: Pallet ROI, Freight, Loss Rate
Model liquidation pallet profit after manifest risk, freight, buyer premium, storage, platform fees, shipping, labor, and target hourly return.
Best Sports Card Grading Company: Cost & ROI Tool
Shortlist PSA, BGS, SGC, or CGC by live tier constraints, then compare exact graded sold comps with the raw-card exit and all-in grading cost.
Return Rate Calculator: True Profit After Returns
Model return rate, damaged returns, shipping loss, fees, and restock value to see how returns change reseller profit before you price inventory.
eBay Best Offer Calculator [Free]: Accept Thresholds
Set your eBay Best Offer auto-accept, decline, and counter thresholds with fee-basis math for resellers. Free calculator included.
Mileage Deduction Calculator 2026: IRS Tax Savings
Calculate reseller tax savings with IRS 2026 split-year rates: 72.5¢ Jan-Jun and 76¢ Jul-Dec. Track sourcing and shipping trips. Free calculator included.
Reseller Inventory Storage ROI Calculator 2026
Calculate whether an inventory storage unit pays for itself using rent, inventory value, sell-through, margin, insurance, and access costs.
eBay vs Mercari 2026: Fees, Item Fit & Net Profit
Compare eBay vs Mercari by net profit, item category, auction and international needs, and shipping eligibility, then rank eight reseller marketplaces.
Auction vs Buy It Now Calculator 2026: eBay Floor Check
Compare eBay auction and Buy It Now profit after fees, shipping, and holding costs. Model low bids and set a minimum profitable price.
Bundle Discount Optimizer 2026: Profit Floor Calculator
Calculate a bundle discount that protects profit after fees, combined shipping, and return risk. Build a counteroffer from your target margin.
Inventory Turnover Calculator 2026: COGS and Sell-Through
Calculate inventory turnover from COGS and average inventory. Check days of supply, sell-through, stale stock, and storage costs before sourcing more.
Inventory Cost Calculator: Lot Cost Basis per Item
Allocate purchase price, freight, tax, repairs, and supplies across a resale lot by units, weight, or custom share, then export per-item COGS.
Shipping Zone Calculator 2026: USPS Zone Risk Planner
Estimate USPS zone risk, enter official zone and postage quotes, check package dimensions, and decide whether flat shipping protects reseller margin.
Cost Per Wear Resale Calculator: Wear, List, or Pass
Compare cost per wear with resale profit. Use sold comps, fees, shipping, condition, and prep costs to decide whether to wear, list, or pass.
Restock Alert Calculator: Reorder Point for Resellers
Calculate reorder points, safety stock, MOQ exposure, budget risk, and one-off inventory guardrails before restocking resale inventory.
Best Listing Time Calculator: Test Resale Posting Windows
Build a controlled listing-time test for eBay, Poshmark, Mercari, Depop, Whatnot, and Facebook without pretending platform traffic by hour is public.
Negotiation Range Calculator: Offer Floor and Counter Script
Calculate your resale offer floor and target price from costs, fees, urgency, and ROI. Get an editable accept, counter, or decline response.
Condition Grade Impact Calculator: Price from Condition Comps
Estimate resale value by condition using sold comps, defects, fees, and repair costs. Compare repair ROI and net payout before pricing.
Financial Calculators guides
Pallet Flipping for Beginners: Manifest Math Before You Bid
Pallet flipping beginners guide with manifest checks, landed-cost math, supplier safeguards, and platform-fee tests before you buy.
Your $500 Flip Month Is Really $180 After Fees 2026
Why that $500 sales month is really $180 in profit. Complete breakdown of 2026 platform fees (eBay, Poshmark, Mercari), actual shipping costs, packaging, sourcing expenses, and the hidden costs that kill margins. Includes real flip example with every cost tracked.
Where to Sell Vintage Jewelry in 2026: Platform Decision Guide
Compare Etsy, eBay, Ruby Lane, 1stDibs, Vestiaire Collective, Poshmark, auctions, and local buyers by value, proof, urgency, official fee checks, authentication, and sold comps.