How to Display the Discount Percentage on the Sale Badge?

Be default Woocommerce sale badge shows only text (“Sale”) but there is no out-of-the-box option if you want the sale badge to show the discount percentage. For example, instead of saying ”Sale” you would like it to show “- 40%”.

Therefore, in this post I am going to show you how to display the discount percentage on the Woocommerce sale badge.

Video: How to Add the Discount Percentage on the Woocommerce Sale Badge?

How to Display the Discount Percentage on the Sale Badge (single products only)?

Step 1: Copy the code here below

Step 2: Add it to your functions.php file. Better option, install and add the code using Code snippets plugin

add_action( 'woocommerce_sale_flash', 'sale_badge_percentage', 25 );
 
function sale_badge_percentage() {
   global $product;
   if ( ! $product->is_on_sale() ) return;
   if ( $product->is_type( 'simple' ) ) {
      $max_percentage = ( ( $product->get_regular_price() - $product->get_sale_price() ) / $product->get_regular_price() ) * 100;
   } elseif ( $product->is_type( 'variable' ) ) {
      $max_percentage = 0;
      foreach ( $product->get_children() as $child_id ) {
         $variation = wc_get_product( $child_id );
         $price = $variation->get_regular_price();
         $sale = $variation->get_sale_price();
         if ( $price != 0 && ! empty( $sale ) ) $percentage = ( $price - $sale ) / $price * 100;
         if ( $percentage > $max_percentage ) {
            $max_percentage = $percentage;
         }
      }
   }
   if ( $max_percentage > 0 ) echo "<span class='onsale'>-" . round($max_percentage) . "%</span>"; // If you would like to show -40% off then add text after % sign
}

How to Display the Discount Percentage on the Sale Badge for variable products, single products and grouped products?

If you need to display the discount percentage on the sale badge for both variable products and sale products then use this code.

// Display the Woocommerce Discount Percentage on the Sale Badge for variable products and single products
add_filter( 'woocommerce_sale_flash', 'display_percentage_on_sale_badge', 20, 3 );
function display_percentage_on_sale_badge( $html, $post, $product ) {

  if( $product->is_type('variable')){
      $percentages = array();

      // This will get all the variation prices and loop throughout them
      $prices = $product->get_variation_prices();

      foreach( $prices['price'] as $key => $price ){
          // Only on sale variations
          if( $prices['regular_price'][$key] !== $price ){
              // Calculate and set in the array the percentage for each variation on sale
              $percentages[] = round( 100 - ( floatval($prices['sale_price'][$key]) / floatval($prices['regular_price'][$key]) * 100 ) );
          }
      }
      // Displays maximum discount value
      $percentage = max($percentages) . '%';

  } elseif( $product->is_type('grouped') ){
      $percentages = array();

       // This will get all the variation prices and loop throughout them
      $children_ids = $product->get_children();

      foreach( $children_ids as $child_id ){
          $child_product = wc_get_product($child_id);

          $regular_price = (float) $child_product->get_regular_price();
          $sale_price    = (float) $child_product->get_sale_price();

          if ( $sale_price != 0 || ! empty($sale_price) ) {
              // Calculate and set in the array the percentage for each child on sale
              $percentages[] = round(100 - ($sale_price / $regular_price * 100));
          }
      }
     // Displays maximum discount value
      $percentage = max($percentages) . '%';

  } else {
      $regular_price = (float) $product->get_regular_price();
      $sale_price    = (float) $product->get_sale_price();

      if ( $sale_price != 0 || ! empty($sale_price) ) {
          $percentage    = round(100 - ($sale_price / $regular_price * 100)) . '%';
      } else {
          return $html;
      }
  }
  return '<span class="onsale">' . esc_html__( 'up to -', 'woocommerce' ) . ' '. $percentage . '</span>'; // If needed then change or remove "up to -" text
}

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Janek T.
I am a Wordpress enthusiast who has been making websites since 2011. In this site I am offering simple to follow tips on how to use Wordpress and Woocommerce. If you want to be the first to be notified about the new tutorials then please subscribe to my Youtube channel here Follow me in Twitter here
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