Stock Multiplier for WooCommerce

Stock Multiplier for WooCommerce solves a critical inventory challenge: selling products in packs while accurately tracking individual units. Whether you sell 6-packs of beverages, bundles of 3 items, wholesale cases, or fabric by the meter – this plugin automatically calculates the correct inventory reduction and tracks every single stock movement with a complete audit trail.

The Problem: You sell a 12-pack of soda, but WooCommerce only reduces your inventory by 1. You need to manually track that you actually sold 12 individual cans.

The Solution: Set a stock multiplier of 12. When someone orders 1 pack, your inventory automatically reduces by 12 units. Plus, you get a complete history of every change – who made it, when, and which order caused it.

Perfect for online stores selling bundles, packs, wholesale quantities, bulk products, or any multi-unit items where accurate inventory tracking is essential for business operations.

Key Features

Stock Multiplier System:
* Custom Multipliers for Any Product – Set different multipliers for simple products and each product variation independently
* Automatic Calculation – Stock automatically reduces by (quantity ordered × multiplier) – no manual math needed
* Smart Inheritance – Variations without a multiplier automatically use the parent product’s setting
* Works for All Product Types – Simple products, variable products, and every variation individually

Complete Inventory History & Audit Trail:
* Track Every Stock Change – Automatic logging of all inventory movements (orders, manual updates, refunds, etc.)
* Detailed Audit Information – See date/time, before/after quantities, who made changes, and which order caused it
* Dedicated History Tab – View last 100 stock movements directly in the product edit page
* Order Linking – Click any order number to view the full order details
* Notes System – Add context and notes to manual stock adjustments

User Experience:
* Zero Configuration – Works immediately after activation, no setup pages or complex settings
* Native WooCommerce Integration – All settings appear naturally in existing WooCommerce tabs
* Lightweight & Fast – Minimal database queries, no performance impact
* Translation Ready – Full internationalization support

Real-World Use Cases

• Beverage Industry – Sell 6-packs, 12-packs, or cases while tracking individual bottles/cans
• Food & Grocery – Manage bundles like “3-pack yogurt” or “dozen eggs” with accurate unit tracking
• Fabric & Textiles – Sell by the meter or yard, track in centimeters or inches
• Wholesale & B2B – Different pack sizes (case of 24, box of 50) with proper inventory deduction
• Product Bundles – “Starter Kit” with 5 items reduces inventory by 5 automatically
• Multi-unit Items – Sock sets, furniture sets, or any product sold as multiples
• Craft & Art Supplies – Sell paint sets of 12 colors, track individual tubes
• Pet Products – Dog treat packs, cat food multipacks with unit-level tracking
• Office Supplies – Pen packs, paper reams sold by case but tracked by unit
• Subscription Boxes – Each box contains 8 items, inventory reduces by 8 per order
• Compliance & Auditing – Full audit trail for inventory accountability and loss prevention
• Warehouse Management – Track which orders depleted stock and when for better forecasting

How It Works

Stock Multiplier:
1. Set a “stock multiplier” value on any product or variation
2. Customer places an order for that product
3. Plugin calculates: stock reduction = ordered quantity × multiplier
4. Inventory is reduced by the calculated amount
5. Change is automatically logged to inventory history

Inventory History:
1. Every stock change is automatically tracked and logged
2. View complete history in the “Inventory History” tab on product edit page
3. See date/time, product/variation, action type, before/after quantities, order links, and user information
4. Add notes to manual stock adjustments for future reference

Example: A 12-pack of soda has multiplier set to 12. Customer orders 2 packs. Your inventory reduces by 24 cans (2 × 12 = 24), and the history shows: Order #123 reduced stock from 100 to 76 (-24).

Configuration

Setting Stock Multiplier

For Simple Products:
1. Go to Products > Edit Product
2. Click on the “Inventory” tab in the Product Data section
3. Find the “Stock reduction multiplier” field
4. Enter your desired multiplier value (minimum: 1)
5. Save the product

For Variable Products:
1. Go to Products > Edit Product
2. Click on the “Variations” tab in the Product Data section
3. Expand any variation
4. Find the “Stock reduction multiplier” field
5. Enter your desired multiplier value for each variation
6. Save changes

Note: If a variation doesn’t have a multiplier set, it will automatically use the parent product’s multiplier value (if set).

Viewing Inventory History

1. Go to Products > Edit Product
2. Click on the “Inventory History” tab in the Product Data section
3. View complete history of all stock movements including:
   • Date & Time of each change
   • Product or Variation name
   • Action type (Order Placed, Manual Update, Stock Increased/Decreased, etc.)
   • Before and After quantities
   • Change amount (color-coded: green for increases, red for decreases)
   • Order number (clickable link to order)
   • User who made the change
   • Notes (click info icon to view)
4. History shows the last 100 records per product

Support

For support, feature requests, or bug reports, please create support ticket: https://wordpress.org/support/plugin/variation-stock-inventory