Selnook
Free profit margin and marketplace fee calculators
E-commerceFree#ecommerce
Launches Nov 4, 2026 at 00:00 UTC
What is Selnook?
Selnook is a free browser toolkit for independent ecommerce sellers. Estimate profit margin, break-even prices, target prices, Amazon FBA fees, Etsy fees, eBay fees and landed cost using your own costs and assumptions. Core calculators work without an account, and saved entries stay in browser local storage. I built Selnook to help sellers compare pricing scenarios before listing a product. Results are estimates: check current marketplace fees and include your own shipping, advertising and other expenses. Selnook does not connect to seller accounts or replace accounting or tax advice.
Selnook features
- Profit margin, target price and break-even calculations
- Amazon FBA, Etsy and eBay fee scenario calculators
- Landed cost estimates and browser-local saved entries
Who uses Selnook and for what
- Compare selling prices after entering product and marketplace costs
- Estimate a break-even price before listing an item
Selnook FAQ
Is Selnook free to use?
Yes. The core browser calculators are free and do not require an account.
Does Selnook connect to my seller account?
No. Enter your own current fees and costs; Selnook calculates estimates from those assumptions.
Where are saved calculator entries stored?
Saved entries stay in local storage in your browser. Optional Google sign-in does not upload calculator inputs.
Comments (0)
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