FREE CALCULATOR · NO SIGNUP TO CALCULATE
What Can I Pay?
Start with an expected sale, allow for fees and costs, and find the most you can pay while meeting your profit and ROI targets.
Free reseller tools
What should I buy —
and what will I keep?
Make the call with a number before money changes hands. These quick tools help you set a buying ceiling and estimate selling costs, without an account or a promise about what an item will sell for.
Pick the decision you need to make. These calculators are free and work without signing up. Downloads require newsletter email confirmation or an Upcyclist account; no paid trial is required.
Before you source
Buying
Start with a realistic sale estimate, account for the costs, and find the most you can put into a flip while leaving room for your target.
A ceiling is not a spending goal. Actual sale prices, condition, returns, shipping, and fees can change the outcome. Give uncertain costs some room.
After the sale
Pricing and fees
Compare eBay vs Poshmark fees, or review Whatnot fees before choosing a marketplace.
Model a sale with the costs and fee assumptions you enter. Check the current marketplace rules for your category and transaction.
FREE CALCULATOR · NO SIGNUP TO CALCULATE
US eBay fee and profit calculator
Estimate supported US eBay fees and what you keep, or work backward to a selling price for your profit goal.
FREE CALCULATOR · NO SIGNUP TO CALCULATE
US Mercari fee and profit calculator
Estimate seller fees and profit with buyer-paid labels, seller-paid labels or your own postage.
FREE CALCULATOR · NO SIGNUP TO CALCULATE
US Poshmark fee and profit calculator
Estimate commission and profit on an accepted item price, with your seller-funded shipping costs and an independent offer comparison.
FREE CALCULATOR · NO SIGNUP TO CALCULATE
General reseller profit calculator
Estimate one item's profit from seller receipts and entered costs, using actual total fees or your own manual fee assumptions.
Fee estimates are not a payout quote. Marketplace rates and transaction details can vary. Use the official fee schedule and your actual costs before making a decision.
Keep the details straight
Tracking
A lightweight guide for building a repeatable record of inventory, purchases, and completed sales.
FREE CALCULATOR · NO SIGNUP TO CALCULATE
Inventory aging calculator
Review remaining acquisition cost and units by calendar age, with a separate view of stock older than 90 days.
FREE RESOURCE · SIGNUP FOR DOWNLOADS
Free reseller lot tracker
Track purchases and successive partial sales, separating sold cost, remaining inventory, realized profit and cash recovery.
FREE CALCULATOR · NO SIGNUP TO CALCULATE
Lot profit and cash recovery calculator
Separate realized profit on sold units from remaining inventory cost and recovery of the whole lot purchase.
FREE RESOURCE · SIGNUP FOR DOWNLOADS
Free reseller inventory spreadsheet
Download a single-item workbook with linked sales, unsold inventory and profit checks, or use plain CSV companions.
Practical guide · not a calculator
How to track reseller inventory
Learn which details to record from sourcing through sale, how to keep acquisition costs and selling costs distinct, and how to make a simple tracking habit easier to maintain.
Useful numbers. Honest limits.
These are decision aids, not market research or financial records. They do not look up current listings, verify platform rates for you, or predict whether an item will sell. Enter assumptions you can support, check the details that apply to your sale, and treat the result as one input to your judgment.
Ready to keep the real numbers together?
Track purchases and completed sales in Upcyclist when you are ready. Calculator estimates are not transferred into your account.
Start your 14-day trial
Free for up to 25 active items. 14 days of Pro included. No credit card required.
A few useful details
Do I need an account to use the calculators?
No. The available calculators are free to use without signing up. A result is an estimate based on what you enter, not a saved inventory item or sale.
Are my calculator inputs saved or sent to Upcyclist?
No. The calculations happen in your browser, and the values you enter are not saved to an account or sent to analytics. Visit counts may be measured under the site's consent settings.
Are fee rates guaranteed to be current for my sale?
No calculator can account automatically for every category, seller plan, shipping arrangement, or policy change. Confirm the official marketplace terms and use the assumptions shown in the individual tool.
Will a calculator tell me whether an item will sell?
No. It can help you test the numbers you provide, but it does not check demand, condition, or likely time to sale. Your actual results may differ.