The official currency of Myanmar is the Kyat (pronounced as ‘Chat'). Banknotes come in denominations of K1, K5, K10, K20, K50, K100, K200, K500, K1000, K5000, K10,000, and coins to the value of 100 and below. Kyat is a non-convertible currency and cannot officially be exchanged abroad.
There are small banks and ATM machines in major towns, however, you are advised to carry some amount of cash- either Kyat or dollars- because sometimes you just cannot rely on ATM machines. Visa or Master cards are accepted in many hotels and also some vendors and small shops do accept cards but not all.
While using US dollar in Myanmar, it is important that your notes are clean and not crumbled and try to use higher denomination notes to attract a better rate of exchange (into Kyat) with money changers but small denomination notes will also be useful for tipping or the purchase of small items. In some places, Euro and Singapore dollar, Thai baht, Indian Rupee, Pounds Sterling or RMB are exchanged as well but the rates are not good compared to US dollars and no Travellers ‘checks are accepted in Myanmar.