Tools built for marketplace sellers
Learn what SellerCalc does and how its marketplace calculators are designed to help online sellers estimate fees, profit and margins.
Simple tools for better selling decisions
SellerCalc is a focused collection of free calculators for sellers using major online marketplaces. The goal is simple: make fee, cost and profitability estimates easier to understand before a seller lists or reprices a product.
What we provide
Our calculators cover marketplace fees, product cost, shipping, payment costs, profit margin, ROI and break-even scenarios. Each calculator is designed to expose the assumptions that affect the result instead of hiding them behind a single number.
Important limitation
Marketplace fee structures can change by country, category, seller plan, promotion and account status. SellerCalc results are planning estimates and should be checked against the marketplace's current official fee information before making a business or pricing decision.
Our approach
We prioritize clear inputs, transparent calculations and practical explanations. As marketplace rules change, calculator assumptions and guides can be updated to keep the tools useful.