Free Tools for Global Sellers

Enter price, cost and package dimensions to get your size tier, shipping weight, referral fee, fulfillment fee, storage cost and break-even price.

Pick a category and price to see the exact referral fee, including tiered categories and the $0.30 minimum.

Storage is billed per cubic foot and roughly triples from October to December. See the real cost of holding inventory.

Turn ad spend and sales into ACoS and ROAS, then add unit economics to find the point where advertising stops being profitable.

Generate FNSKU labels, UPC barcodes and shipping labels, then export print-ready PDFs in standard Avery layouts.

Etsy charges its 6.5% transaction fee on shipping as well as the item price. See what actually reaches your account.

eBay bills its final value fee on the total sale including shipping and sales tax. Work out your true net proceeds.

See exactly why a product lands in a tier, and what changing one dimension would do to your fulfillment fee.

Walmart charges only a category referral fee on the total sale. Pick your category to see the rate and your margin.

Editable referral rate plus optional creator commission — model organic and affiliate sales side by side.

See what you actually earn on a Poshmark sale, and where the flat fee makes cheap items unprofitable.

Statutory holidays are only half the story: factories stop taking orders before a break and run at reduced output after it. This shows the real disruption window and back-plans your order date from the day stock has to arrive.

53 rules across Amazon, Etsy, eBay, Walmart and TikTok Shop — character limits, the 250-byte search terms limit, banned promo wording, duplicate tags. Every finding links to the source page.