WooCommerce: Variable Product "Cumulative" Stock Quantity

When a variable product stock quantity is managed at variation level, the stock status is either “In stock” or “Out of stock” without any mention of the quantity.

It would be cool, however, and in certain cases only, to show the total stock quantity for all single variations. If variation Red has 3 in stock, variation Blue has 7 in stock and variation Cyan has 10 in stock, I’d like to set the “parent product” stock quantity to 3 + 7 + 10 = 20.

So, how do we do that?

This variable product has stock quantity = 13, because its two variations have stock = 3 and stock = 10 respectively!

PHP Snippet: Variable Product Stock Quantity = Sum of All Single Variations’ Stock Quantity

/** * @snippet Cumulative Stock Quantity @ Variable Product * @how-to Get CustomizeWoo.com FREE * @author Rodolfo Melogli * @compatible WooCommerce 8 * @donate $9 https://businessbloomer.com/bloomer-armada/ */ // CALCULATE CUMULATIVE STOCK function bbloomer_cumulative_stock_variations( $product ) { if ( $product->get_type() == ‘variable’ && ! $product->get_manage_stock() ) { $cumulative_stock = 0; foreach ( $product->get_available_variations() as $key ) { $variation = wc_get_product( $key[‘variation_id’] ); $cumulative_stock += $variation->get_stock_quantity() ? $variation->get_stock_quantity() : 0; } } return $cumulative_stock; } // SET VARIABLE PRODUCT STOCK QUANTITY add_filter( ‘woocommerce_get_stock_html’, ‘bbloomer_variable_product_cumulative_stock’, 9999, 2 ); function bbloomer_variable_product_cumulative_stock( $html, $product ) { $availability = $product->get_availability(); if ( $product->get_type() == ‘variable’ && empty( $availability[‘availability’] ) ) { ob_start(); wc_get_template( ‘single-product/stock.php’, array( ‘product’ => $product, ‘class’ => bbloomer_cumulative_stock_variations( $product ) > 0 ? ‘in-stock’ : ‘out-of-stock’, ‘availability’ => sprintf( __( ‘%s in stock’, ‘woocommerce’ ), bbloomer_cumulative_stock_variations( $product ) ), ) ); return ob_get_clean(); } return $html; } // SHOW STOCK @ SINGLE VARIABLE PRODUCT PAGE add_action( ‘woocommerce_before_add_to_cart_form’, ‘bbloomer_stock_for_variable_products’ ); function bbloomer_stock_for_variable_products() { global $product; $availability = $product->get_availability(); if ( $product->get_type() == ‘variable’ && empty( $availability[‘availability’] ) ) { echo wc_get_stock_html( $product ); } }

Where to add custom code?

You should place PHP snippets in your child theme functions.php file and CSS in style.css. Need guidance? Take a look at Where to Place WooCommerce Customization? and Should I Add Custom Code Via WP Editor, FTP or Code Snippets?

This code still works, unless you report otherwise in the comments. To troubleshoot, temporarily switch to the Storefront theme, disable all plugins except WooCommerce, and test the snippet again: Troubleshooting 101.

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