Terms & Conditions

Last updated 7 August 2026

By using this calculator you agree to the terms below.

What this tool is

A free estimating tool for Amazon FBA sellers. It computes per-unit profit, margin, ROI, and breakeven ACOS from figures you supply.

No guarantee of accuracy

Results are estimates only and depend entirely on the inputs you enter. Amazon's fee schedules, referral rates, and storage charges change over time and vary by category, size tier, and season. Always confirm figures against your own Seller Central reports before acting on them.

Not professional advice

Nothing here is financial, tax, accounting, or legal advice. You are responsible for your own business decisions and for verifying the numbers you rely on.

No warranty and no liability

The tool is provided "as is", without warranty of any kind. To the fullest extent permitted by law, we accept no liability for any loss, lost profit, or damage arising from your use of it, or from any error, interruption, or unavailability.

Your data

Saved records live only in your browser. We hold no backup. Losing them (by clearing site data, switching browsers, or using a different device) is not recoverable by us.

Changes

These terms may be updated; the date above reflects the current version. Continued use after a change means you accept it.

Contact

Questions: senlin.xue@gmail.com