Add Custom Shipping Rates by Product Weight in WooCommerce

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Explanation

To set up custom shipping rates based on product weight in WooCommerce, you can use a simple code snippet. Here's how it works:

Weight Thresholds: The code defines different weight categories. For example, up to 5kg, 5kg to 10kg, and 10kg to 20kg.
Shipping Costs: Each weight category has a corresponding shipping cost. For instance, $5 for up to 5kg, $10 for 5kg to 10kg, and $20 for 10kg to 20kg.
Total Weight Calculation: The code calculates the total weight of items in the cart.
Cost Assignment: It checks which weight category the total weight falls into and assigns the appropriate shipping cost.
Adding the Fee: If a shipping cost is determined, it adds this cost to the cart as a fee labeled "Weight Based Shipping."

This approach allows you to automatically adjust shipping costs based on the total weight of products in the customer's cart, making it a flexible solution for weight-based shipping in WooCommerce.

Code
<?php

// Add custom shipping rates based on product weight in WooCommerce
add_action('woocommerce_cart_calculate_fees', 'wp_dudecom_custom_shipping_by_weight');

function wp_dudecom_custom_shipping_by_weight() {
    if (is_admin() && !defined('DOING_AJAX')) {
        return;
    }

    $weight_thresholds = array(
        0 => 5,    // Up to 5kg
        5 => 10,   // 5kg to 10kg
        10 => 20,  // 10kg to 20kg
    );

    $shipping_costs = array(
        0 => 5,    // $5 for up to 5kg
        5 => 10,   // $10 for 5kg to 10kg
        10 => 20,  // $20 for 10kg to 20kg
    );

    $total_weight = WC()->cart->get_cart_contents_weight();
    $shipping_cost = 0;

    foreach ($weight_thresholds as $weight => $cost) {
        if ($total_weight > $weight) {
            $shipping_cost = $shipping_costs[$weight];
        }
    }

    if ($shipping_cost > 0) {
        WC()->cart->add_fee(__('Weight Based Shipping', 'wp-dudecom'), $shipping_cost);
    }
}

?>

Instructions

To implement custom shipping rates based on product weight in WooCommerce, follow these steps:

File Location: Add the code to your theme's functions.php file or a custom plugin file.

Prerequisites:

Ensure WooCommerce is installed and activated on your WordPress site.
Backup your site before making changes to the code.

Implementation Steps:

Access your WordPress admin dashboard.
Navigate to Appearance > Theme Editor if you are adding the code to functions.php. Alternatively, use an FTP client or file manager to access your WordPress files directly.
Locate and open the functions.php file of your active theme. If using a custom plugin, open the plugin file.
Copy the provided code snippet.
Paste the code at the end of the functions.php file or your custom plugin file.
Save the changes to the file.
Test the functionality by adding products to your cart and checking if the shipping costs adjust based on the total weight.

If you encounter any issues or need further assistance, consider reaching out to wp-dude.com for expert help with implementation or more advanced functionality.