Display Woocommerce Discount Price as Saved Amount/Percentage for Simple/Variable Products

woocommerce-product-discount-functions.php

<?php
/********* Woocommerce Simple / Variable Product Discount (Saving Amount or Percentage)  *********/

/*

* Depeding on your product type (SIMPLE or VARIABLE) and the DISCOUNT type you prefer to be displayed under the price
(SAVED AMOUNT or SAVING PERCENTAGE), simply choose the proper code snippet as follows and add to your theme's functions.php.

*/

// Simple Product - Saved Amount

add_action( 'woocommerce_single_product_summary', 'simple_product_saving_amount', 11 );
function simple_product_saving_amount() {
    global $product;

    if( $product->is_type('simple') && $product->is_on_sale() ) {
        $regular_price = (float) wc_get_price_to_display( $product, array('price' => $product->get_regular_price() ) );
        $active_price  = (float) wc_get_price_to_display( $product, array('price' => $product->get_sale_price() ) );

        $saved_amount  = $regular_price - $active_price;
        
        echo '<p id="saving_total_price">'. __("You Saved") .': ' . wc_price($saved_amount) . ' </p>';
    }
}

// Simple Product - Saving Percentage

add_action( 'woocommerce_single_product_summary', 'simple_product_saving_percentage', 11 );
function simple_product_saving_percentage() {
    global $product;

    if( $product->is_type('simple') && $product->is_on_sale() ) {
        $regular_price = (float) wc_get_price_to_display( $product, array('price' => $product->get_regular_price() ) );
        $active_price  = (float) wc_get_price_to_display( $product, array('price' => $product->get_sale_price() ) );

        $saved_amount  = $regular_price - $active_price;
        $percentage    = round( $saved_amount / $regular_price * 100 );

        echo '<p id="saving_total_price">'. __("You Saved") .': '.$percentage.'% </p>';
    }
}

// Variable Product - Saved Amount

add_filter( 'woocommerce_available_variation', 'variable_product_saving_amount', 10, 3 );
function variable_product_saving_amount( $data, $product, $variation ) {

    if( $variation->is_on_sale() ) {
        $saved_amount  = $data['display_regular_price'] - $data['display_price'];
        
        $data['price_html'] .= '<p id="saving_total_price">'. __("You Saved") .': ' . wc_price($saved_amount) . '</p>';

    }
    return $data;
}

// Variable Product - Saving Percentage

add_filter( 'woocommerce_available_variation', 'variable_product_saving_percentage', 10, 3 );
function variable_product_saving_percentage( $data, $product, $variation ) {

    if( $variation->is_on_sale() ) {
        $saved_amount  = $data['display_regular_price'] - $data['display_price'];
        $percentage    = round( $saved_amount / $data['display_regular_price'] * 100 );

        $data['price_html'] .= '<p id="saving_total_price">'. __("You Saved") .': '.$percentage.'%</p>';

    }
    return $data;
}