All calculators

eBay, Amazon FBA, and Etsy fee stacks — plus one Shopify processing footnote. Every page is an estimate for planning, not your seller payout. Rates as of 2026-07-19. How defaults work: methodology.

eBay

Final value fee, per-order fee, profit after cost, category rates, and 2026 checks.

Amazon FBA

Referral + fulfillment rough cut, cost in, profit out — planning math, not Fee Preview.

Etsy

Listing, transaction, processing — optional Offsite Ads and reverse list price.

Shopify

Payment processing estimate — footnote channel, not a marketplace pillar.