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The add-on lets the store sell a product not only by pieces, but also by packs. Customers see clear quantities on the storefront, while the cart, checkout, and stock calculations take the number of units in each pack into account.
The add-on is useful for stores that sell products in boxes, cartons, bundles, or other package-based quantities. It helps keep the storefront price clear for customers while preserving correct accounting for packed sales.
The administrator sets the sale rules and can override them for individual products. On the storefront, shoppers change the number of pieces or packs, and the add-on recalculates the linked value automatically. In the cart and at checkout, the product keeps the correct quantity, price, and line total.
Main settings are available in Add-ons → Manage add-ons → MS: Packs. Product-level settings are available on the product editing page in the MS: fractional stock and packaging tab.
The add-on is useful for wholesale and retail stores, B2B storefronts, and any catalog where products are often sold as sets or packs.
Have questions about the add-on?
The add-on lets the store sell a product in packs and keeps quantity, price, and stock calculations consistent on the storefront, in the cart, and at checkout.
Choose what the standard Weight field on the Shipping properties tab contains, globally or for an individual product:
Disable global packaging settings to configure a product individually. Products sold individually retain their standard weight calculation.
Example: a test weight of 0.95 kg with 12 units per pack gives 11.4 kg for one pack and 22.8 kg for two. Enter the actual product weight in the store weight units; litres and kilograms are not interchangeable.
The quantity step controls the quantity selector, not weight. Shipping freight and delivery tariffs are not automatically changed.
No CS-Cart core edits are required. The add-on uses native cart addition and update hooks. A previously inserted add_product_to_cart_post_normalize_amount call is no longer used by packaging; keep it if another add-on needs it.
[!] Manual pack quantity edits remain synchronized with pieces after using the piece quantity buttons.
[*] Added handler preservation checks, including external cart change listener failures.
[!] Fixed quantity buttons and field handlers in quick-view dialogs by passing string identifiers correctly to JavaScript.
[!] A hidden quantity control now submits one pack instead of using the number of pieces inside the pack as the pack quantity.
[*] Synchronized Responsive and UniTheme2 templates; added template compilation and quantity-control regression checks for different prefixes.
[!] Fixed shipping weight for packs when the product weight is specified per piece.
[+] Added piece/pack weight interpretation to add-on settings, product settings, and product import/export.
[*] Existing products retain the previous pack weight behavior.
[!] Removed the manual core patch requirement: quantities use native CS-Cart hooks for cart addition and updates, including mixed sales and inventory checks.
[!] Piece quantities are derived separately from each validated cart line, keeping different product options independent.
[*] Updated instructions and translations; added weight regression checks.
[!] Fixed a fatal Smarty compilation error in the checkout template for the UniTheme2 theme (invalid ternary operator syntax) that made the checkout page unavailable on CS-Cart 4.18.3.
[*] Checked all add-on templates in the Responsive, UniTheme2 and YoupiTheme themes for correct ternary operator syntax.
[*] Updated the add-on code, templates, and integration files.
[*] Updated the add-on description, instructions, and changelog.
[!] Fixed order total and commission calculation when selling products in packs.
[!] Fixed cart totals recalculation after changing product quantity in UniTheme2.
[-] Fixed product list display on checkout when used together with Convenient Cart: price, quantity, total, and remove controls are aligned, with a responsive layout for different screen sizes.
[*] Improved product display on checkout in UniTheme2.
[*] Updated the module template.
[!] Fixed module styles display in the UniTheme2 theme.
[*] Standardized the module.
[+] Fixed adding a product from the product card to the wishlist: the product is no longer added twice.
[*] Changed price display.
[+] Added a setting that lets the store owner choose which price is shown first on the product page.
[+] First release.
Legend:
[+] Added
[-] Removed
[*] Changed
[!] Bug fixed