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
 * @donate $9     https://businessbloomer.com/bloomer-armada/

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>'; 
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Where to add custom code?

You should place PHP snippets at the bottom of your child theme functions.php file and CSS at the bottom of its style.css file. Make sure you know what you are doing when editing such files - if you need more guidance, please take a look at my guide "Should I Add Custom Code Via WP Editor, FTP or Code Snippets?" and my video tutorial "Where to Place WooCommerce Customization?"

Does this snippet (still) work?

Please let me know in the comments if everything went as expected. I would be happy to revise the snippet if you report otherwise (please provide screenshots). I have tested this code with Storefront theme, the WooCommerce version listed above and a WordPress-friendly hosting.

If you think this code saved you time & money, feel free to join 17,000+ WooCommerce Weekly subscribers for blog post updates and 250+ Business Bloomer supporters for 365 days of WooCommerce benefits. Thank you in advance!

Need Help with WooCommerce?

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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.

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

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If you are writing code, please wrap it between shortcodes: [php]code_here[/php]. Failure to complying with this (as well as going off topic, not writing in English, etc.) will result in comment deletion. 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 BloomerArmada to get blog comment reply priority, ask me 1-to-1 WooCommerce questions and enjoy many more perks. Thank you :)

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