Selling in multiple currencies
To sell in multiple currencies, you need to have Shopify Payments enabled in your online store. When you sell to multiple countries and regions, your customers can view prices in your store, pay for their orders at checkout, and receive refunds in their local currency. You can choose to have prices converted automatically using the current market exchange rate, or converted manually using an exchange rate that you choose.
If your store is on the Shopify plan or higher, then you can also control prices in different countries or regions using international pricing.
If your theme doesn't come with a currency selector, then you can add a currency selector so that customers can select their local country or region. You can also use Shopify's Geolocation app to prompt customers to switch to their local pricing.
For more information, refer to Sell in multiple currencies with Shopify Payments.