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
 * @community     https://businessbloomer.com/club/


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;


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'] ) ) {
				'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;


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 custom PHP in functions.php and custom CSS in style.css of your child theme: where to place WooCommerce customization?

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

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Rodolfo Melogli

Business Bloomer Founder

Author, WooCommerce expert and WordCamp speaker, Rodolfo has worked as an independent WooCommerce freelancer since 2011. His goal is to help entrepreneurs and developers overcome their WooCommerce nightmares. Rodolfo loves travelling, chasing tennis & soccer balls and, of course, wood fired oven pizza. Follow @rmelogli

Questions? Feedback? Customization? Leave your comment now!

If you are writing code, please wrap it like so: [php]code_here[/php]. Failure to complying with this, as well as going off topic or not using the English language will result in comment disapproval. You should expect a reply in about 2 weeks - this is a popular blog but I need to get paid work done first. Please consider joining the Business Bloomer Club to get quick WooCommerce support. Thank you!

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