How can I add field on cart page that calculates summary of meters of a product

Topic summary

A shop owner selling fabric needs to display calculated meters on the cart page, where 1 unit equals 0.5 meters (e.g., 3 units = 1.5 meters).

Proposed Solution:

  • Use the Easify Product Options app to replace Shopify’s default quantity selector
  • Create a custom quantity field where customers input desired fabric length in meters
  • Set pricing per meter (e.g., $10/meter)

Implementation Details:

  • The app includes both app settings configuration and storefront display options
  • Multiple screenshots provided showing the setup process and customer-facing interface

The discussion remains open with one suggested solution but no confirmation of implementation or alternative approaches explored.

Summarized with AI on November 13. AI used: claude-sonnet-4-5-20250929.

I have this shop that sells fabrics.

One unit is half a meter. If a buyer selects 3 units, how can I display on the shopping cart page that he will buy 1,5 meter of that fabric?

Any ideas?

Thanks for your help in advance.

Hi @anney1984 ,

You should try out the Easify Product Options app. It lets you create and display a quantity field for customers to input their preferred fabric length (meters), effectively taking over the default Shopify quantity selector :hugs: . As for pricing, you can set it to charge customers per a meter (like $10 for a meter).

Take a look at this example:

  • Storefront:

  • App Settings: