If you’re managing a WooCommerce store that ships physical products, ensuring that each product has an accurate weight assigned is crucial. This impacts shipping calculations, which in turn affects your bottom line. However, as your product catalog grows, it can be challenging to spot those items that are missing this key information.
In this guide, we’ll show you how to efficiently find products with no weight in WooCommerce without using a plugin, using custom code to search your product listings.
Why Is Product Weight Important in WooCommerce?
Accurate product weight is essential for:
- Shipping Costs: Most shipping methods calculate costs based on the product’s weight. If the weight is missing, it can lead to incorrect shipping charges.
- Carrier Integration: Popular shipping carriers such as UPS, FedEx, or Australia Post require product weights to calculate shipping fees.
- Customer Trust: Displaying accurate shipping costs upfront improves the customer’s checkout experience and trust in your store.
How to Find Products Without Weight Using Code
Here’s a simple way to find all products that have no weight assigned. This code snippet queries your WooCommerce product catalog and checks for any products with a missing or empty weight. Add the following code to your theme’s functions.php file, or use a child theme to ensure your changes are safe from theme updates.
/*
* Snippet: WooCommerce Admin: How to Find Products With No Weight – 2026
* Author: John Cook
* URL: https://wcsuccessacademy.com/?p=1494
* Tested with WooCommerce 10.7.0
* "This function queries WooCommerce products to find those with no weight assigned"
*/
function wcsuccess_find_products_without_weight() {
$args = array(
'post_type' => 'product',
'posts_per_page' => -1, // Get all products
'meta_query' => array(
array(
'key' => '_weight',
'compare' => 'NOT EXISTS' // Find products without weight
)
)
);
$query = new WP_Query($args);
if ($query->have_posts()) {
echo '<ul>';
while ($query->have_posts()) {
$query->the_post();
echo '<li>' . get_the_title() . ' (ID: ' . get_the_ID() . ')</li>';
}
echo '</ul>';
} else {
echo 'All products have weight assigned.';
}
wp_reset_postdata();
}
// Example usage:
add_action('admin_menu', 'wcsuccess_add_menu_page');
function wcsuccess_add_menu_page() {
add_menu_page('Products Without Weight', 'No Weight Products', 'manage_options', 'wcsuccess_no_weight_products', 'wcsuccess_find_products_without_weight');
}
Understanding the Code
This function, wcsuccess_find_products_without_weight, does the following:
- WP_Query: It queries the WooCommerce products, checking for those where the
_weightmeta key doesn’t exist. - Display Results: The results are output as a list of product titles and IDs, making it easy to identify and update missing weights.
- Admin Menu: We also added a menu item in the WooCommerce admin under “No Weight Products”, making it accessible directly from your admin dashboard.
How to Use This Code
- Add the Code: Paste the above code into your theme’s
functions.phpfile, or better yet, use a child theme. - Navigate in Admin: After adding the code, go to your WooCommerce Admin, and you’ll see a new menu item labeled “No Weight Products”.
- Update Products: Clicking on this menu item will show you a list of products that don’t have any weight assigned. You can then go back and update the missing weights for accurate shipping calculations.
Best Use Cases for Finding Products Without Weight
- New Product Imports: If you’ve recently bulk imported products, it’s easy to miss filling out the weight field. This function will help you catch those.
- Store Audits: Periodically auditing your store for missing data is always a good practice. Use this function as part of your store management routine.
- Shipping Issues: If you notice discrepancies in shipping costs, this function can help identify whether missing product weights are contributing to the problem.
For more advanced WooCommerce customisations, check out our helpful resources like the WooCommerce Visual Hooks Guide and the wp-config generator.
Conclusion
Finding products with no weight in WooCommerce doesn’t have to involve installing another plugin. By using a simple code snippet like the one above, you can easily find and fix missing product weights, ensuring accurate shipping calculations and a smoother customer experience.
Using custom code gives you full control over your WooCommerce store, helping you optimise performance without relying on third-party tools. Make sure to use a child theme to safely modify your theme’s functions.php file and future-proof your store’s customisation.
I have been working with WordPress and WooCommerce since 2012 and have developed a deep knowledge of the content management system. Since 2012, I have developed several plugins and designed dozens of websites utilising different frameworks, CMS’s and programming languages. I am proficient in PHP, Python, Java, C, C++, R and JavaScript with limited experience in Go, Kotlin and Swift.
Educationally, I have a Master’s degree in cyber security a Bachelor’s (Hons, First Class) in Applied Research and a Graduate Certificate in Data Science. I’m currently undertaking PhD studies investigating IoT cybersecurity. I recently graduated with First Class Honours and Masters of Information Technology, receiving the Executive Dean’s Award for studies undertaken in the 2021 and 2022 academic years. I have worked in the information technology industry for the past 11 years primarily as a software/web developer specific to design, optimisation, network management and security. My research interests are in the areas of Internet of Things (IoT), 5G and Beyond Networks, information security for wireless networks and software development.
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