Change default currency in PayPal
1. Login into your PayPal account
2. Click on “Wallet”
3. Add a new currency if you want by choosing “Add a currency”
4. Click on the menu (3 dots) next to the currency and then on “Make Primary”
By making a specific currency your primary one, PayPal will just calculate all the money you have into this currency. The amount you see is just estimated based on the daily exchange rate. If you want to convert all your different currencies into your main one, then check out this article.