If you plan on traveling with a single-voltage device (electric or electronic), you need to know the power supply at your destination to ensure your device will power up safely. For example, your 110V electric toothbrush will not work with, say, Italy's 230V power unless you have an adapter plug AND a converter.

Not sure if you have any single-voltage items? See the REI Expert Advice article, Electricity Guide for Travelers, to determine if you do.

The power supply (voltage and frequency) and the types of outlets differ between countries. There is no international standard.

Tip: It’s easier to purchase adapter plugs or converters before you go; they can be surprisingly hard to find in your destination country.

Use the map and chart below to locate power information by country. The Outlet Type column corresponds to our Electricity FAQs and Glossary article. Note: The letter used to denote the adapter plug type may not correspond with a plug manufacturer's description or labeling.

* Brazil has no standard voltage. Most states use 127V electricity (Acre, Amapá, Amazonas, Espírito Santo, Mato Grosso do Sul, Maranhão, Pará, Paraná, Rondônia, Roraima, Sergipe and Minas Gerais). Other (mainly northeastern) states are on 220V (Alagoas, Brasília, Ceará, Mato Grosso, Goiás, Paraíba, Rio Grande do Norte, Santa Catarina and Tocantins). Although in most parts of the states of Bahia, São Paulo, Rio de Janeiro and Rio Grande do Sul 127V is used, the cities of Santos, Jequié, Jundiaí, São Bernardo do Campo, Novo Friburgo, Bagé, Caxias do Sul and Pelotas run on 220V. The states of Pernambuco and Piauí use 220V, except for the cities of Paulista and Teresina (127V).

** Although the main voltage in Japan is the same everywhere, the frequency differs from region to region. Eastern Japan uses predominantly 50 Hz (Tokyo, Kawasaki, Sapporo, Yokohama, Sendai), whereas Western Japan prefers 60 Hz (Osaka, Kyoto, Nagoya, Hiroshima).

*** Saudi Arabia uses 110V in many parts of the country, such as the Dammam and al-Khobar area (situated in the eastern province of Ash Sharqiyah). 220V is commonly used as well, especially in hotels.

Updates and corrections: Countries can and do change their name, power supply and outlet design. The information provided here is a guideline and cannot to be relied upon as 100% accurate. We welcome any updates or corrections from your personal traveling experience.