Here you’ll find the essential information you need to help guide your customers on their next trip to the USA, such as the dialling code, time difference, plug sockets and more.

• Population: 340 million
   
• Capital city: Washington, D.C
   
• Currency: US dollar
   
• Exchange rate: 1 US dollar = 0.75 Pound sterling or 0.88 Euro (as of June 2025)
   
• Time difference: 

  • Central Daylight Time (Chicago) – GMT-5

  • Mountain Daylight Time (Denver) – GMT-6

  • Mountain Standard Time (Phoenix) – GMT-7

  • Pacific Daylight Time (Los Angeles) – GMT-7

  • Alaska Daylight Time (Anchorage) – GMT-8

  • Hawaii-Aleutian Standard Time (Honolulu) – GMT-10

• International dial code: +1
   
• Languages: English is the official language of the USA, with Spanish also widely spoken.
   
• Visas: To enter or transit through the USA, those carrying a full British Citizen passport must have either an Electronic System for Travel Authorisation (ESTA) or a visa. Apply for an ESTA here. You cannot apply for an ESTA visa waiver if you travelled to or were in Cuba on or after 12 January 2021. If you are not eligible for an ESTA, you must instead apply for a US visa. Find out more about entry requirements on gov.uk.
   
• Plug sockets: For the USA there are two plug types: types A and B. Plug type A is the plug which has two flat parallel pins and plug type B is the plug which has two flat parallel pins and a grounding pin.
   
• Standard voltage: The USA operates on a 120V supply voltage and 60Hz.
   
• Safety information: Please see gov.uk for the most up to date information.