Embed our box size and carton fit calculator (free)

Embed our box size and carton fit calculator

A free, attribution-only widget for packaging guides, 3PL resource pages, ecommerce operations blogs, and Shopify themes.

Help readers estimate the smallest practical carton size from item dimensions, fragility, and protection needs. They can also test a specific carton size to see whether the item fits and how many units fit in an axis-aligned packout.

Live preview

Copy this embed code

<iframe
  src="https://packrift.com/pages/free-box-size-carton-fit-calculator-widget"
  title="Box size and carton fit calculator by Packrift"
  width="100%"
  height="760"
  frameborder="0"
  loading="lazy"
  style="display:block;width:100%;border:0;"></iframe>

What it does

  • Estimates a minimum internal carton size from item dimensions plus clearance.
  • Adjusts clearance for low, medium, and high fragility items.
  • Accounts for common protection methods: paper, bubble wrap, foam, and air pillows.
  • Tests a specific carton size and estimates how many units fit.
  • Suggests nearby common corrugated box sizes and a practical strength note.
  • Flags oversized cartons where void space or dimensional weight may become a problem.

Good use cases

  • Packaging guides that explain how to choose a shipping box.
  • 3PL and fulfillment-center resources for ecommerce brands.
  • Marketplace-seller guides on reducing shipping damage and oversized parcel cost.
  • Warehouse SOP pages where operators need a quick first-pass carton check.

Terms

  • Free for commercial and personal sites.
  • Keep the "Calculator by Packrift" attribution visible. The widget includes it by default.
  • No warranty. Results are estimates and should be confirmed with a physical test pack before ordering at volume.
  • No signup, analytics script, or third-party JavaScript is required for the iframe.

Notes for site owners

  • The iframe is responsive and fills the width of its container.
  • Use a height of about 760px on desktop. If your page has a narrow content column, 860px gives the mobile stack more room.
  • If your CMS blocks iframes, you can host the standalone HTML under your own domain with the same visible attribution.

Have a packaging calculator request? Email support@packrift.com.