Free Amazon Seller Tools
Practical calculators and checklists for Amazon sellers who want clearer profit, PPC and inventory decisions without another monthly subscription.
Break-Even ACOS Calculator
Calculate break-even ACOS, break-even ROAS and a target ACOS that leaves your desired profit.
Open calculator →FBA Profit Margin Calculator
Estimate profit per unit and margin using your selling price, VAT, landed cost and Amazon fees.
Open calculator →Reorder Point Calculator
Turn sales velocity, lead time and safety stock into a practical reorder point.
Open calculator →PPC Quick Audit Checklist
Run a structured quick check of your Amazon PPC account and identify obvious areas to investigate.
Get the checklist →Seller Guides
Read practical guides covering ACOS, ROAS, search terms, inventory, product research and FBA profit.
Read the guides →Complete Seller Toolkit
Own the reusable spreadsheets for PPC, profit, inventory and product research in one bundle.
View the bundle →Why CalcCommerce offers free tools
A quick calculator is useful for one decision. Reusable spreadsheets are better when you need to repeat the process across SKUs, scenarios or large PPC exports. These free tools let you check the core logic before deciding whether a paid tool is useful for your workflow.