About EcomCalc

What we build

EcomCalc is an independent calculator library for ecommerce sellers. It turns published platform fee schedules into practical fee, profit, margin, break-even, and royalty estimates.

The site currently covers Shopify, Etsy, eBay, Amazon FBA, Amazon KDP, and TikTok Shop. EcomCalc is not affiliated with or endorsed by those platforms.

Why source-linked calculations matter

Platform pricing is rarely one universal percentage. Market, category, plan, payment method, product format, weight, and optional programs can all change the result. We keep assumptions visible and link to the public sources used for each approved rate snapshot.

Editorial standard

• Published calculator rules must have an approved status and an update date.
• Official platform documentation is preferred over third-party summaries.
• Calculators distinguish modeled fees from costs the seller must enter.
• Material rate changes are reviewed before they replace a published snapshot.