North America · field briefing
United States uses Type A / Type B power outlets at 120V, 60Hz. The general emergency number is 911. Tap water is generally safe to drink.
Last reviewed . Verify visa and entry rules with official authorities before travel.
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United States runs at 120V. Travelers from 220–240V regions (Europe, most of Asia) need a voltage converter for devices that aren't dual-voltage.
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Tap water is generally safe to drink.
Tipping is a normal part of service culture in the United States. Restaurant diners commonly tip 15-20% before tax, with higher tips for excellent service. Taxi, rideshare, hotel and bar service often expect smaller tips as well.
Spring and autumn are the easiest seasons for many city trips because temperatures are milder and crowds are lower. Summer is popular for national parks and beaches, while winter is best for ski regions and warm-weather states such as Florida, Arizona and Hawaii.
Entry rules depend heavily on nationality and trip purpose. Many visitors use the Visa Waiver Program with an approved ESTA, while others need a visitor visa before travel. Check current rules with the U.S. Department of State or CBP before booking.
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Questions
Yes. Tap water in United States is considered safe to drink.
United States uses Type A, Type B plugs running at 120V, 60Hz. United States runs at 120V. Travelers from 220–240V regions (Europe, most of Asia) need a voltage converter for devices that aren't dual-voltage.
Dial 911 for general emergencies in United States. Police: 911. Ambulance: 911.
Spring and autumn are the easiest seasons for many city trips because temperatures are milder and crowds are lower. Summer is popular for national parks and beaches, while winter is best for ski regions and warm-weather states such as Florida, Arizona and Hawaii.
In United States, traffic drives on the right side of the road, so the steering wheel is on the left.
The international dialing code for United States is +1. Dial this prefix after your exit code (e.g. 00 or +) to call a United States number from abroad.
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