It’s easy enough in WooCommerce to get/calculate product sales. What’s difficult, on the other hand, is calculating the total amount of sales for a specific category, because there is no core function that already does that.
Why sales by category – you may ask? Well, to me, that’s a very important metric. For example, I sell both consulting and non-consulting products on this same website, so it’s important for me to keep track of category sales year-on-year, especially when my goal is reducing 1-to-1 client work while increasing scalable product sales such as courses, plugins and memberships.
In this quick tutorial, we will first get the “WooCommerce orders that contain a target product category”, and after that we will loop through the array to calculate the total sales for that specific category. Sounds difficult? No worries – just copy and paste the snippets below.
PHP Snippet: Get Total Purchase Amount For a Specific WooCommerce Product Category
/**
* @snippet Calculate Product Category Sales Amount
* @how-to businessbloomer.com/woocommerce-customization
* @author Rodolfo Melogli, Business Bloomer
* @compatible WooCommerce 7
* @community https://businessbloomer.com/club/
*/
// 1. ORDERS GETTER
function bbloomer_get_orders_by_product_cat( $cat_slug, $order_status = array( 'wc-completed' ) ) {
global $wpdb;
$args = array(
'limit' => -1,
'status' => 'publish',
'return' => 'ids',
'category' => array( $cat_slug ),
);
$product_ids = wc_get_products( $args );
$results = $wpdb->get_col( "
SELECT order_items.order_id
FROM {$wpdb->prefix}woocommerce_order_items as order_items
LEFT JOIN {$wpdb->prefix}woocommerce_order_itemmeta as order_item_meta ON order_items.order_item_id = order_item_meta.order_item_id
LEFT JOIN {$wpdb->posts} AS posts ON order_items.order_id = posts.ID
WHERE posts.post_type = 'shop_order'
AND posts.post_status IN ( '" . implode( "','", $order_status ) . "' )
AND order_items.order_item_type = 'line_item'
AND order_item_meta.meta_key = '_product_id'
AND order_item_meta.meta_value IN ( '" . implode( "','", $product_ids ) . "' )
" );
return $results;
}
// 2. SALES CALCULATOR
function bbloomer_cat_sales( $cat_slug ) {
$orders = bbloomer_get_orders_by_product_cat( $cat_slug );
$total = 0;
foreach ( $orders as $order_id ) {
foreach ( wc_get_order( $order_id )->get_items() as $key => $item ) {
$product_id = $item->get_product_id();
if ( ! $product_id ) continue;
if ( has_term( $cat_slug, 'product_cat', $product_id ) ) $total += $item->get_total();
}
}
return wc_price( $total );
}
// 3. USAGE
// E.G. YOU COULD PLACE THIS IN THE BACKEND OF FRONTEND:
echo bbloomer_cat_sales( 'tables' );
Where in the backend is the number of sales displayed?
Inside the “custom fields” meta box (edit product admin page)
This code not providing correct total sales for one particular category
It only counts “completed” orders, maybe that’s the issue?
No, I have tested woo-commerce analytics reports only for completed orders, the above code given amount and analytics amount have big mis match
It could be a WooCommerce Analytics sync problem, too! Lol. Anyway, it’s difficult to say without taking a look at your website backend. My code works on my test website so not sure I’m afraid