Fractional Product Quantities for Shopify POS

Accounting & Taxes
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Topic summary

Merchants migrating from QuickBooks to Shopify POS can now sell products in fractional quantities (by weight, length, yardage, etc.) using the “Fractional Product Quantities” app.

Key Features:

  • Sell any product, variant, or SKU with fractional quantities
  • Add fractional amounts directly to the POS cart
  • Automatically syncs and adjusts inventory to reflect fractional sales
  • Supports measurements including weight, length, yardage, unit measurements, and fractions

Known Issue:
A user reported a tax calculation problem: when selling tax-exempt items, the fractional portion is incorrectly being taxed. The app appears to only work properly for taxable items, with no apparent solution found for preventing taxation on the fractional portion of exempt products.

The original post includes links to download the app from the Shopify App Store and access a complete setup guide and walkthrough (links appear reversed/encoded in the source text).

Summarized with AI on November 16. AI used: claude-sonnet-4-5-20250929.
1

One big question some merchants have when migrating from Quickbooks onto Shopify POS is how they can sell products with fractional quantities (such as by weight, units, length, yardage, etc).

As a result, we wanted to share some information and a guide on how this can be done extremely smoothly inside of Shopify POS through an app.

With the “Fractional Product Quantities” app, you can now sell products with fractional quantities in POS. With this app, you can easily select a single product/variant or multiple products/variants within the POS. Specify the fractional quantity or amount of each selected product/variant that you want to sell. Add those products/variants and their specified fractional quantities to the POS cart. Then proceed to checkout your customer. The app automatically syncs and adjusts your inventory accurately.

With the app you can:

  • Sell any product, variant, or SKU with any fractional quantity you’d like.
  • Add products with fractional quantities to the POS cart to checkout customers.
  • Reflect products/variants sold in fractional amounts accurately in inventory.
  • Sell products by yardage, weight, length, unit measurements, fractions, & more.

Download the app for Shopify: https://apps.shopify.com/pos-fractional-quantities

Here is also a complete guide and walkthrough: https://docs.google.com/document/d/1B2s6c3vDMzQDbFOQTO6J-fHJAfXOrx2WuoUFMYWpCrw/edit

2 Likes
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When using this app with a tax exempt item, the fractional portion of the item is getting taxed and I cannot find a way to stop that from happening. If you need to use fractional quantities on items this app seems to only work if the item is taxable.