Embeddable widget

Add a fee calculator to any reseller page

The widget runs current 2026 FlipCalc fee math inside an isolated iframe and includes a baked-in attribution link back to sellerfeecalc.com.

Lazy

iframe loading plus optional viewport loader

Free

no API key or account needed

Branded

built-in attribution backlink

Copy-paste HTML

Simple iframe

<iframe
  src="https://sellerfeecalc.com/embed/ebay"
  title="eBay fee calculator"
  loading="lazy"
  width="100%"
  height="560"
  style="border:0;border-radius:16px;max-width:448px"
></iframe>

Viewport-loaded script

<div data-flipcalc-embed data-platform="ebay" data-height="560"></div>
<script async src="https://sellerfeecalc.com/embed.js"></script>

Platforms

Pick the marketplace that matches the page

Options

data-platform

ebay, etsy, poshmark, mercari, depop, facebook, stockx, whatnot, amazon, or grailed

data-height

iframe height in pixels; default is 560

data-title

optional accessible iframe title