SellerLab

About SellerLab

Our Mission

SellerLab was built with a simple goal: to give cross-border e-commerce sellers the free, accurate tools they need to make informed business decisions. We believe that every seller — whether just starting out or running a large operation — deserves access to reliable fee calculators and business planning tools without hidden costs.

What We Offer

We develop and maintain a suite of specialized seller tools covering major e-commerce platforms and marketplaces worldwide:

  • eBay Fee Calculator — Supporting 7 marketplaces (US, UK, Germany, Australia, Canada, France, Italy) with complete final value fee, payment processing, and profit calculations.
  • Amazon FBA Fee Calculator — Covering 17 marketplaces worldwide with referral fees, FBA fulfillment fees, storage costs, and net profit analysis.
  • More tools coming soon — Including calculators for TikTok Shop, Shopify, Walmart, and more.

Our Expertise

Our team has hands-on experience in cross-border e-commerce, having sold on multiple platforms across different markets. This first-hand knowledge drives the accuracy and practical design of our tools. We continuously update our fee data and calculation logic to reflect the latest platform policies and rate changes.

Accuracy & Transparency

We take accuracy seriously. Our calculators are built by carefully studying official platform documentation, seller announcements, and real-world fee structures. Each market configuration is thoroughly tested against known fee scenarios.

That said, platform fees can change at any time. We always recommend verifying final fees with the respective platform before making important business decisions.

Why Free?

We believe essential seller tools should be accessible to everyone. SellerLab is supported by advertising, which allows us to keep all tools completely free. We are committed to maintaining a clean, user-friendly experience while displaying relevant, non-intrusive ads.

Get in Touch

Have feedback, suggestions, or found an error in our calculations? We'd love to hear from you. Contact us and help us make SellerLab even better.