WooCommerce: Add to Cart Quantity Suffix

On a default WooCommerce install, we add X products to cart by defining the add to cart quantity on the single product page.

But what if your shop sells spices? It’s likely that those quantities are actually pounds / kilograms / or whatever weight unit you require. And what if your WooCommerce business is entirely focused around Italian extra virgin olive oil (asking for a friend!), that you’d sell per liter?

In such custom cases, it’s nice to specify the unit beside the add to cart quantity, so that customers know how much and what they are buying. So, let’s see how to add an add to cart quantity suffix beside the quantity input field on the single product page. Enjoy!

In this case, I needed to specify that each quantity unit is 1 liter. It’s easier now for WooCommerce customers to understand how much they are buying, which means better reviews and fewer returns.

PHP Snippet: Add to Cart Quantity Input Suffix @ WooCommerce Single Product Page

 * @snippet       Quantity Suffix @ WooCommerce Single Product
 * @how-to        Get CustomizeWoo.com FREE
 * @author        Rodolfo Melogli
 * @compatible    WooCommerce 7
 * @community     https://businessbloomer.com/club/

add_action( 'woocommerce_after_quantity_input_field', 'bbloomer_echo_qty_front_add_cart' );
function bbloomer_echo_qty_front_add_cart() {
	echo '<span class="qty-suff">liters</span>'; 

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

3 thoughts on “WooCommerce: Add to Cart Quantity Suffix

  1. Hey Rodolfo,

    I hope you are doing well.

    Thank you so much for your tutorial. I have a similar scenario that I am trying to overcome. I just want to add the Cart Quantity Input Suffix on a single product/category. One of my clients sells cable by the meter and it is just this particular product that I want to change the suffix to ‘meters’. They ell other items y the qty so it is just this one product/category that is sold by the meter.

    Is this possible?

    Thanks in advance,

    1. Hi Rodolfo,

      Would you have a solution to my query below please?

      One of my clients sells cable by the meter and it is just this particular product that I want to change the suffix to ‘meters’. They sell other items so the suffix ‘qty’ is OK for those products so it is just this one product/category that is sold by the meter.

      Thank you

      1. Hey Kingsley! I suggest you take a look at “conditional logic”: https://businessbloomer.com/woocommerce-conditional-logic-ultimate-php-guide/. Let me know

Questions? Feedback? Customization? Leave your comment now!

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