SMALL TOOLBOX · Online Seller Profit Calculator
Online Seller Profit Calculator
Calculate per-item profit, profit margin and break-even sale price after costs and fees.
Inputs and settings
Results and preview
Enter the details and run the tool.
Instructions and important notes
Returns, discounts, local tax filing and specific marketplace fee rules are not determined automatically.
Your file contents are processed in this browser, not uploaded for processing or included in visitor statistics.
Who should use this tool?
Calculate per-item profit, profit margin and break-even sale price after costs and fees.
Before you begin
Enter sale price, cost, platform fees, packing, delivery and advertising costs; provide only independently verified tax rates.
Step-by-step instructions
- Prepare the supported inputs described above. Keep original files as a backup.
- Use the tool controls to process the information. Review any on-screen warnings before proceeding.
- Inspect the generated output against your input before downloading or printing.
What will you receive?
An itemized profit summary and downloadable CSV.
Limitations and incorrect-result cases
Returns, discounts, local tax filing and specific marketplace fee rules are not determined automatically.
Questions about your data
Are my files sent to a server?
File-processing calculations run in this browser. Hosting, fonts, analytics scripts and optional third-party libraries may still make network requests. Read our privacy policy for details.
Should I trust the output without checking?
No. Compare important results with the original and use a professional check where legally or technically required.