The Thai unit of currency is called the Baht (THB), and it is divided into 100 satang. Notes come in 10-baht, 20-baht, 50-baht, 100-baht and 1,000-baht denominations. If you want to see the Baht's exchange rate against other currencies please click here www.xe.com.
Currenciesy can be exchanged at the airport, banks, hotels and accredited monoeychangers.
American Express, Diners Club, MasterCard and Visa credit cards are generally accepted, but not universally. Cheaper guesthouses and restaurants do not accept plastic.
ATMs are in most (if not all) cities and tourist areas, inlcuding Phuket, Ko Pha Ngan, Ko Samui, Ko Tao, Ko Chang, and Ko Phi Phi. Depending on the bank, the withdrawal limit may range from 20,000 THB to 100,000 THB.