Weight-Based Product Packs for WooCommerce

This plugin is designed for stores that sell by filling containers with a chosen combination of goods — for example nuts and dried fruits packed into pre-ordered 1 kg, 2 kg or 5 kg boxes.

The customer picks a pack, then fills it with the weight bundles you define (e.g. a 100 g pistachio pack, a 200 g almond pack). The total weight must exactly match the pack capacity — the Add to Cart button stays disabled until the pack is perfectly full.

Features

• New “Weight-Based Pack” product type with any capacity (grams)
• Fill packs with weight bundles (simple products or product variations)
• Pack-size switcher when sibling packs (e.g. 1/2/5 kg) share the same items category
• Grouped cards: one card per item with its weight/grade variations inside
• Weight progress bar, live price calculation and a visual box preview on the product page
• Price = sum of bundle prices + optional fixed box cost
• Server-side validation: under-filled and over-filled packs are rejected
• Stock is reduced automatically after payment and restored on cancellation
• Contents breakdown shown in cart, checkout, admin orders and emails
• Shipping weight of each pack equals its capacity
• Multiple packs with different contents in one order
• HPOS compatible; tested with WooCommerce 6–11
• Translation ready (Persian translation included)

Usage

Step 1: create the weight bundles

For each item (pistachios, almonds, …) create a WooCommerce product:

• Recommended — variable product: e.g. “Pistachios” with a “Weight” attribute and 100 g / 200 g / 500 g variations. Give each variation a price and a weight (the standard WooCommerce weight field) and, with stock management enabled, a stock quantity (e.g. 100 units of the 100 g bundle).
• Simple product: each bundle is a standalone product with a price, weight and stock.

Important: bundle weights must be entered in the standard WooCommerce weight field; the plugin converts them to grams based on the store weight unit (WooCommerce → Settings → Shipping → Weight unit). With the unit set to kg, a 100 g bundle is 0.1.

Put all items in one product category (e.g. “Nuts”).

Step 2: create the pack

1. Go to Products → Add New.
2. In the Product data box set the type to Weight-Based Pack.
3. In the Pack Settings tab:
   • Pack capacity (grams): e.g. 1000 for a 1 kg box
   • Box cost (optional): fixed packaging amount
   • Allowed items category: the category from step 1
   • Excluded IDs (optional)
4. Publish.

Repeat with capacities 2000 and 5000 for the 2 kg and 5 kg boxes.

Step 3: the customer experience

1. The customer opens a pack from your shop (the “Build pack” button).
2. Using the + / − buttons they choose how many of each bundle to include; the weight progress bar and live price update as they go.
3. “Add pack to cart” is enabled only when the total weight exactly matches the capacity (e.g. 5 × 200 g = 1000 g).
4. The customer can add more packs with different combinations to the same cart and check out once.