Free tools for UK sellers
Calculators and tools for running UK multi-channel commerce.
Free, no sign-up. Built for UK sellers actually running volume across Amazon, eBay, Temu, TikTok Shop and wholesale.
Available now
Marketplace Fee Calculator
Compare fees and profit across Amazon UK, eBay, Temu and TikTok Shop side by side. Per-category commission rates, 2026 fee data.
Open the toolNewOversell Risk Calculator
Model expected oversells per 100 orders given your stock, sync cadence, safety buffer and channel count. Includes concrete recommendations to reduce risk.
Open the toolComing soon
Courier Rate Comparison
Compare effective courier rates (Royal Mail, Evri, DPD, Yodel, Amazon Shipping) for your weight and volume profile.
Coming soonTemu vs Amazon Profitability Calculator
Model the profit difference of the same product sold on Temu (with direct courier labels) versus Amazon UK (FBM/FBA).
Coming soonSafety Buffer Optimiser
Bulk-optimise safety buffer % across your entire SKU catalogue based on per-SKU velocity and margin data.
Coming soon