FREE TOOLS FOR UK ONLINE SELLERS
Calculate Your Profit and Sell Smarter Online
Check marketplace fees, profit, ROI, pricing, stock performance, shipping, tax and business growth with free tools built for UK resellers. Compare selling platforms or use our practical guides to make better sourcing, listing and selling decisions.
20+ free tools · Six major marketplaces · Built for UK sellers
What Do You Need to Calculate?
Choose what you’re trying to work out and go directly to the SellerStack calculator designed for that decision.
Calculate My Profit
See what remains after stock costs, marketplace fees, postage, packaging and other selling expenses.
Calculate ProfitCheck a Stock Purchase
Work backwards from the expected selling price and calculate the maximum you should consider paying.
Find My Maximum Buy PriceSet My Selling Price
Calculate the selling price needed to protect your target profit and profit margin.
Calculate Selling PriceCompare Marketplaces
Compare estimated fees, profit, margin and ROI across six major selling platforms.
Compare MarketplacesCompare Shipping Costs
Compare delivery scenarios and see how postage costs could affect your final profit.
Compare Shipping CostsCheck HMRC Thresholds
Check your sales activity against important UK trading, reporting and VAT thresholds.
Check My ThresholdsMeasure and Plan Your Reselling Business
Track stock turnover, identify dead stock, measure your hourly return, plan inventory cashflow and work backwards from your monthly profit goal.
Choose Your Selling Platform
Find practical UK selling guides, fee information, calculators and strategies for the marketplace you use—or compare your options before deciding where to list.
eBay UK
Access eBay selling guides, fee calculators, listing advice, shipping resources and marketplace comparisons.
Explore eBay ResourcesAmazon UK
Learn how Amazon FBA works, understand fulfilment costs and calculate whether a product has enough margin.
Explore Amazon UKVinted UK
Get help with pricing, postage, bundles, selling rules, tax questions and calculating your potential profit.
Explore Vinted UKDepop UK
Learn how to create stronger listings, price your products and account for payment, boosting and selling costs.
Explore Depop UKEtsy UK
Understand Etsy fees, product pricing and the practical steps involved in selling handmade or vintage products.
Explore Etsy UKTikTok Shop UK
Learn how TikTok Shop selling works and calculate commission, affiliate and fulfilment costs before listing.
Explore TikTok ShopNot sure which marketplace could leave you with the strongest profit?
Compare Marketplace Profit →New to Reselling? Start Here
Follow a practical route from starting your first resale project and buying stock to setting prices and creating listings that attract buyers.
Start Selling
Build the foundations of your reselling activity and avoid expensive mistakes before committing money to stock.
- How to Start Reselling Online
- How Much Money Do You Need to Start?
- Beginner Reseller Mistakes to Avoid
Source and Price Stock
Learn how to identify worthwhile products, control buying costs and set selling prices that protect your profit.
- Find Profitable Products to Resell
- How Much Should You Pay for Stock?
- How to Price Products for Profit
Create Better Listings
Improve the titles, photographs and descriptions buyers see when deciding whether to purchase your item.
- Write High-Converting Product Titles
- Take Product Photos That Sell
- Write Product Descriptions That Sell
Start with the complete UK beginner’s guide and follow the process from your first product idea through to listing and selling.
Read the Complete Beginner Guide →Fix a Common Selling Problem
Choose the issue that sounds familiar and go directly to the guide or calculator that can help you decide what to do next.
My eBay listings get no views
Check titles, item specifics, photographs, pricing and other visibility problems.
Improve listing viewsMy eBay items aren’t selling
Find possible reasons your listings receive attention but fail to produce sales.
Troubleshoot slow salesMy profit is lower than expected
Add every selling cost and see what remains after fees, postage, packaging and stock.
Check my real profitI’m unsure what to pay for stock
Learn how demand, selling price, costs and target return should shape your buying limit.
Set a safer buying priceShipping costs are reducing my profit
Compare shipping services, avoid common parcel mistakes and find more efficient postage options.
Reduce shipping costsTax and bookkeeping feel confusing
Understand common record-keeping mistakes, important figures and the difference between sales and profit.
Understand seller accountsTools That Can Make Selling Easier
Explore practical equipment and software for photographing products, printing labels, researching listings and managing a growing reseller operation.
Labels and Dispatch
Reduce repetitive packing work and create a more organised dispatch process as your sales volume increases.
- Thermal label printers
- Parcel scales and measuring tools
- Shipping and label services
Photography and Lighting
Create clearer product photographs using a practical setup that improves buyer confidence without requiring an expensive studio.
- Lighting and background options
- Smartphone photography setup
- Simple editing tools
Listing and Research Tools
Research demand, improve listing quality and understand what buyers are searching for before purchasing stock.
- Marketplace research tools
- Keyword and listing analysis
- Product-demand research
Software and AI Tools
Reduce repetitive work across listing creation, product research, inventory organisation and seller administration.
- Listing and writing assistance
- Cross-listing software
- Inventory and workflow tools
Master the Marketplace
The ultimate weekly digest for the modern UK seller. Latest platform updates, sourcing goldmines, and scaling secrets—zero fluff, all profit. Get new selling guides, fee calculators, and marketplace tips every week.
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