Twenty-two free calculatorsbuilt for cross-border sellers
Margins, FBA tiers, dimensional weight, duty estimates, inventory turns, and more—plain formulas, no AI calls, free to use.
These tools are free to use. Our core product is AI Customer Service.
All 22 tools
Margins, FBA tiers, dimensional weight, duty estimates, inventory turns, and more—plain formulas, no AI calls, free to use.
See if your price leaves healthy margin before launch.
Save priced products into a candidate pool and compare side by side before you commit
Write Amazon's disclosure tag into AI-person product photos locally — no pixel changes, no upload
Automatically split an Amazon A+ long image into per-module files, entirely in your browser
How many units you must sell to cover costs.
Check whether ad spend is paying back.
Same item, different venues—see net after fees.
If FX moves 1%, what happens to margin?
If return rate rises 1%, how much margin you lose.
Convert between currencies with live rates.
Back out last order date without stockouts or bloat.
Billable weight vs actual—avoid freight surprises.
Know the fee tier before you ship FBA.
Title and bullet length vs marketplace caps.
See if important terms show up where they should.
Is the description easy to scan and on-policy?
Headline VAT rates for EU, UK, AU-style markets.
Rough duty before goods hit the US or EU.
See if cash is stuck on the shelf.
Deduplicate lines and copy the clean result.
Switch between upper, lower, and title case.
Rank terms by frequency; export to CSV.