Using Gravity Forms ‘gform_product_quantity’ PHP filter

The gform_product_quantity filter allows you to change the sub-label for the Product Quantity input in Gravity Forms.


A generic example of how to use the filter:

add_filter('gform_product_quantity', 'set_quantity_label', 10, 2);

To target a specific form, add the form ID after the hook name:

add_filter('gform_product_quantity_6', 'set_quantity_label', 10, 2);


  • $sublabel (string): The sub-label to be filtered.
  • $form_id (integer): ID of the current form.

More information

See Gravity Forms Docs: gform_product_quantity


Change the quantity sub-label to “How many:”

This example changes the quantity sub-label to “How many:”.

add_filter('gform_product_quantity_185', 'set_quantity_label', 10, 2);

function set_quantity_label($sublabel, $form_id) {
    return 'How many:';

Note: Place this code in the functions.php file of your active theme.