Know your profit before you sell.
Free calculators for Vinted, eBay and everyday reselling. Work out profit, ROI, margins, break-even prices and offers in seconds — no account required.
Browse stock by niche
Stay on the homepage, open a niche below, then browse current eBay UK listings. Run the numbers through our calculators before buying.
👟 TrainersJob lots & bundles
Browse trainer job lots and bundles suitable for individual resale or splitting into smaller lots.
Browse trainers on eBay UK →👕 ClothingMixed job lots
Find mixed clothing job lots for Vinted, eBay and other resale platforms.
Browse clothing on eBay UK →📱 ElectronicsBundles & job lots
Browse electronics bundles and job lots, then compare the buy-in cost against your target margin.
Browse electronics on eBay UK →🧥 Vintage ClothingBundles & wholesale
Find vintage clothing bundles and compare the purchase price with realistic resale values.
Browse vintage stock on eBay UK →🏷️ Branded ClothingBundles & job lots
Browse branded clothing bundles and check whether the cost leaves enough room for profit.
Browse branded stock on eBay UK →Pick a tool
Vinted Profit Calculator
Estimate profit, ROI and margin after your own item and fulfilment costs.
eBay Profit Calculator
Use editable fee fields for postage, selling fees and promoted listing costs.
Reselling ROI Calculator
See the percentage return on the money you put into a flip.
Break-Even Calculator
Find the minimum sale price needed to avoid making a loss.
Discount Calculator
See the new price and money saved when a buyer asks for a discount.
Postage + Profit
Check whether delivery and packaging are eating too much margin.
Profit Margin Calculator
Calculate gross profit and margin percentage from cost and sale price.
Target Sale Price
Work backwards from the profit you want and find your required sale price.
Offer Calculator
Compare a buyer's offer against your cost, minimum profit and margin.
Use the target sale price calculator before you buy to decide whether the potential flip is worth it.
Find a target sale price →Use the offer calculator before accepting a lower price and see what profit remains.
Check an offer →Stop relying on the selling price alone.
A £60 sale is not £60 profit. Your real result depends on what you paid for the item and the costs of getting the sale completed. These tools make those numbers quick to check before you buy, list, accept an offer or post an item.
Marketplace policies and fees can change, so calculators that involve marketplace charges use editable fields rather than pretending one fee structure applies to every seller.
Reselling calculator FAQs
What is a good ROI for reselling?
There is no universal target. A higher ROI means more profit relative to purchase cost, but time-to-sell, risk, returns and effort also matter.
Is profit margin the same as ROI?
No. Profit margin compares profit with revenue. ROI compares profit with the amount invested in the item.
Are the calculator results guaranteed?
No. They are estimates based on the values you enter. Always check current marketplace rules, tax obligations and real postage costs.