A one-page reference of the numbers and basics every Bangkok visitor should know.
Bangkok proper: around 10.7 million people; the greater metropolitan area: over 17 million — one of the world's largest urban agglomerations.
ICT (Indochina Time), UTC+7, no daylight saving adjustments — consistent year-round.
Thai is the official language; English is widely spoken in tourist areas, hotels, and malls, less so in local neighbourhoods and markets.
Thai Baht (THB); see the currency guide for notes, coins, and exchange tips.
220V/50Hz; Type A and Type C sockets; see the electricity guide for adapter details.
191 (police/general emergency), 1155 (Tourist Police, English-speaking), 1669 (medical emergency).
Tropical, hot year-round; cool season (Nov–Feb) is the most comfortable, hot season (Mar–May) is the most intense, and rainy season (Jun–Oct) brings frequent but usually short afternoon downpours.
Not mandatory but appreciated — rounding up or leaving small change at restaurants, and 20–50 THB for hotel staff and massage therapists is standard practice.
220V, 50Hz standard; Type A and Type C sockets are both common, so most travellers can get by with a simple universal adapter rather than a Thailand-specific one.