Two WooCommerce stores selling almost identical product ranges can end up with completely different Australia Post shipping costs at checkout, not because of anything Australia Post is doing differently, but because of how each store’s packaging calculation is configured. Getting this setting wrong is one of the quieter ways a store either overcharges customers on shipping or absorbs a loss on every order without noticing. This guide explains the difference between weight-based and product-based shipping rules in the PH Australia Post MyPost Business Shipping for WooCommerce plugin, when each one makes sense, and how to configure it correctly. On This Page Australia Post MyPost Business Packing Methods for WooCommerce Shipping Australia Post Weight-Based vs Product-Based Shipping: What Actually Changes at Checkout Product-Based Packing Weight-Based Packing Which Packing Method Should You Choose? Real-World WooCommerce Use Case Conclusion FAQs Australia Post MyPost Business Packing Methods for WooCommerce Shipping The way products are packed can directly affect how Australia Post calculatesshipping ratesfor a WooCommerce order.