This plugin displays the shipping cost under the add to cart button. The price that is displayed is the increase in shipping costs if the product is added to the cart. This is a basic plugin without any options. If you would like an advanced plugin that adds a shipping calculator to your products, WooCommerce Shipping Calculator on Product Page is the plugin you are looking for https://codecanyon.net/item/woocommerce-shipping-calculator-on-product-page/11496815?ref=wpshowcase.