The official currency of Belarus is the Belarusian ruble (BYN).

The exchange rate for the Belarusian ruble can fluctuate, so it's important to check the current rate before making any currency exchanges. You can find the current exchange rate on websites such as nbrb.by or Google.com/finance.

When exchanging money in Belarus, it's important to note that the country has strict currency exchange regulations. It is illegal to exchange currency on the street and you can only exchange money at banks or authorized currency exchange offices.

It's also important to keep in mind that some places in Belarus may not accept foreign currency, so it's a good idea to have some Belarusian rubles on hand.

It's always advisable to check the exchange rate before making any transactions, and also to be aware of the commission or fees charged by the bank or exchange office.

Additionally, it's important to note that some older notes and coins may not be accepted by merchants or banks and also not all merchants may accept credit or debit cards.

It's always good to have cash on hand as backup and always double check the amount before making any transactions.