Plus and minus buttons for OpenCart product quantity

The " Plus/Minus for Product on Category Page " module adds a convenient quantity counter with - and + buttons to product cards in lists (categories, search, promotions, manufacturer, and showcase modules). Customers can immediately select the desired quantity directly from the catalog, and the price is displayed correctly based on the selected quantity and currency settings.

Why do you need a module?

When a store sells items that are often purchased in multiples (consumables, packaging, fasteners, cosmetics, drinks), the extra step of "open product → select quantity → add" significantly reduces conversion. This module eliminates unnecessary steps: quantity can be adjusted with one click directly in the product list.

Important: The module takes into account the minimum quantity of a product and can limit the selection to the maximum value (based on the remaining quantity), displaying prompts for the buyer.

Key Features

• Plus/minus buttons next to the quantity field for each product in the list.
• Support for minimum quantities (for example, a product is sold in quantities of 2 or more) and setting the default value to minimum.
• Transfer and use of maximum quantity (based on availability/remaining quantity).
• Working with shares the module stores both the regular price and the special price in "unformatted" form for correct recalculations.
• Replacing the standard "Add to cart" button with a button linked to the selected quantity ( without manual entry on the product page ).
• Correct price formatting for the current currency (symbols on the left/right, separators, number of decimal places).

Where is it displayed?

The quantity counter appears not only in the category, but also in other typical store lists:

1. category page;
2. manufacturer's page;
3. promotions/special offers;
4. search;
5. showcase modules displaying a list of products ( extension/module templates).

Practical examples of application

Example 1. You sell disposable cups in packs, minimum = 5. A customer in the category immediately clicks "+" to 10 or 15 and adds them to cart without opening the product card.

Example 2. In the "Promotions" section, the buyer selects several items and adjusts the quantity of each directly in the list—this speeds up the order and increases the average order value.

Recommendations for use

• If products are sold in multiples of a package, set a minimum quantity on the product card and ensure that the buyer sees clear instructions.
• For items with limited stock, make sure the quantity is up-to-date so that the maximum value accurately reflects availability.